Document reyXQpJwpJNz6OB1mdqvxnpKE

Air Hygiene Foundation of America, Inc. * 4400 Fifth Avenue, i. Pittaburgh, Pa* June 8, 1938 REFEESJfCBS 70 REC2NT LI1 * -%t\ OK INDUSTRIAL DISEASES (A) Newa^\ js 7 KIXBS TOR LEAD PUCES, circular, have announced the spirator for protection against mercury, manganese, arsanie, of this type to receive U. S. fpersoids, zinc, ate* ral of the Bureau* OHI A w publication It )u? to ba issued educational aatarlal o contains itos on the reporting of occupational tarest. nt of Beelth, Columnua. 11 contain informational and _ era* Tha first issua, April 1939, of tha department, mobile laboratory, .toss of general ia- (B) 438 NOTE OK AK 21. 202-3 ( ^/Eil.Dunn. J. Xnd* Hyg. & Toxicol., '44\ A descrip'ttjp&fiAfires of a new cell i^aunting iaplngor dust samples* Tha consists of two parts, ona grojg^qniJoth surfaces, with a central ici* glass plats 1 sm. thick, dloeter that the cell gpproxtaately 0.25 ml. The ot plate of optically lished glass* Both are of "pyrex* _ , le cover glass, such those now used, any ba employed as a corer^ call greatly re- duces the loss of tine in cleaning and reconuntiac tha Sedgwick-Rafter call* Tha comparatively large sealing area prevents of air into the cell caused by evaporation of tha. liquid/ Although no te data has been collect- ed to compare counts using tha new'.cell with that Sedgwick-Rafter, rou tlna plant studies her* confirmed its apparent aooura ghs call could also be easily adapted to plankton, sewage or bacteriological because of the simplicity of design and resistance to attack upon autocl^^^teriliration. 439 THE RATS 07 FRODOCTIOH AND THE PHEE SILICA OQNISir 07 THE ftf^UST PRODUCED H? ROCK gmr.TTIS. A* Shaw and J.Q. Grahan* Trans* Instn- Min* Sagrs. London, 97, 104-15, (April 1939). (British). Tha free silica content of fins dust is almost always less than that.of the rock from which it is faimed. It is dependent also on the rate of drilling, being 9 slightly higher the slower the rate of drilling* The free silica dust produc tion expressed as gras of dust per foot of hole drilled may be taken as an in dication of tha silicosis producing character of tha rock. The resulta indicate that all rocks from which mere than 25 gm* of free silica-dust are formed per ' foot of hole drilled ahould be considered harmful, ad that preeautlone should than be taka. . 2 PLAINTIFFS i EXHIBTT- References to Recent Literature - Z 440 SHICOSIS AND nS FHETfifTXON. X. S. Haldane, ? Haynes, A. Shaw end J. Q,, Graham* Trans. lasts. Min. tegrs. London. 97, 40*67, {April 1939). (British). It is suggested that the toxm silicosis be applied only to a fibrot1c condition of the luags is persons with aa exposure to dust containing a high proportion (50 or more) of free silica. Clinical aad radiological examination should not be regarded as sufficient basis for a diagnosis unless there is a reasonable history of exposure to free silica dust. Although a large nunber of coal workers in South Wales hate been certified asmSlicotic, the work-histories of the cases show that the men hate not been suhi^obad to highly siliceous dusts. The phthi sis. #a$h-rate among the coal mis6&)an shown by their statistics, is not si nif: naxfx population of tha district. The hi< cide: miners should not be attributed to silcj as has past. It is emphasised, however^Mt\tbe''in* halation of any dust will causa pulmonary daaMa^Tollow- ina the es of interesting discussions by otJaCfcaiSBrities in the field. (above) states that tha authors' deflnif&nA^r^sillcosis as proved cases of siliC9fls'^South Africa have bean , tha paper con- trib disease. . 441 GP THB uvnr Office, London, (1939) Among tha larga lumber directly with industrial silicosis clinically, bu cosis is compensable sis in South Wales, alttee on Toxio Solv ers, checks at age th^ toxic! ducad. Mantl of a public* toxic solv ing q very us es along-4 d^kSflal health lines are 1937*8. H. M. Stationery in this report are seme dealing coal miners, which resembles not compensable, whereas silicontlnus the study of anthraco- on is the work of the CornAssociation of Chemical Mocufactur- new solvents that are introzee the literature on Other less Important research- 0? "CCRIOUS BODIES" IK T&S LWQ&Xl SOCn^AVHICAN GOLD MINERS. J. Path. 4 Bacteriol., 48, 47^^Ular^^K^). (British). Lous bodies* is the tea often applied t6^ th> pec*$ittv structures found in >asbestotlc lungs. They are light colored, but^imilar m ones have been found in tha lunge of coal miners. Tha author rsgbpts bratffly on such bodies seen in the lungs of 3 South African gold mlaers'^hn:>has examined. Both light and dork colored bodies were found, and In seme lunge^Both types wore present simultaneously. There was no constant relation, however^ between the presence of bodies tad silicotic findligs, and Dr. Wlllias Is S^p^that tha bodies are not significant in the development of anthraco-sillcosis he coal miners and triaaers she has sznlnsd. They are probably the reeult oiSds^anfie inhalation of fibers or spicules. These black cored bodiea evidently camfctr be produced ex perimentally, although tha pale asbestotlo ones can be. 443 THE PRODDCnoM OP DOST IN SABD HEADDOS AND MEANS POB ITS SUPPRESSION. J. Graham, D. G. Skinner and W. H. Walton. Trnns. Instn. Min* tears. London. 97, 83*103 (April 1939). (British). Experiment* are deaerlbed which illustrate the eoneentratlons of dust in the chief operations inrolved in the driving of hard headings, namely drilling, shot firing end filling. The most important means found to reduce tha dust was the use of wet drilling methods. The use of a mist projeetar, with a wetting agent in the spray water, was only slightly successful. References to Recast Literature - 3 444 A DEVICE FOR AHRESTOtJ EXPLOSIONS. Q. Allsop* E. I* Hartwell cad R. V. Wheeler. Trans. Insta* Mia* Eagr. London. 97, 20-39 (April 1939). (British). A description la given of arrangements whoreby firedamp explosions la coal nines can be extinguished. The arrangements involve the provision of (1) mortars from which a cloud of incombustible dust can be projected into the path of the explo sion* and (2) thermal relays which* when subjected to the heat of an explosion, close an electric current which operal the mortars. The incombustible dust found most effective consists of n salt, 180 chalk and 20 magnesltaa carbonate. Tests made with the have proved its effectiveness* 445 (April To the boea a mo fortunate portent oc Anaconda sins Daly. Min. Cong. 7., 25 blcm of Industrial haalth Is not newg^JdJitff always factor In his costs. Tho natal minlgcjMSstry is ;th acny other industries* in that^fe w&Pbut one in anely ailieosls. The authoi^Aaagor of Hines, traces the dust ccmtemNaeasures of that company ,918. The paper gtx0\3ebd broad discussion of ts control. 446 TBE XXJ3I FBO 18-19, 72-4* (May 1939) Dust control Is an trial engineering management and should ba given coaslderat aace has baea gained during the pest and industries have found control of the duet problem has not been prohibitive* Coasid Ten to duet* whether hygienically significant or not* y^lhk^aign dings or new processes that may be potentially dustyy? |Sr)/teats or ' uld be made at regular intervals to check the r of the systcrfsv.to higher employee morale and to find hazards. OEANXNO HET9DD6. fred 67, 44-6* 92 (Hay 1939). ited description is given of t the new cleaning depart- a foundry* Small eastings are cl leblast machine; largo ttings are cleaned by first rtm ng the of high pressure Water, then blaetlng with steel shot. All aryestis_gjK , wet methods and the sludge is reclaimed* This modem installatoion3nia'ss naodv^'oinly almost elimin- ated the dust hazard in the foundry, but has realigns saving of over 750 in the time of tfrying cores in large castings* 446 PRACTICAL HTTFElOfi EQR THE CQJURQL OE SOTHCEC nFOSOBES^sfr. A* Cobum* Am. J. Pub* Health* 29, 501-6 (Hay 1939). The author presents a emery of the general consideration^, prevention of industrial diseases. The hazards of dust* cbromlim* lead* agff other materials ore discussed* The paper was presented at the October 28* 1938* meeting of the American Public Health Association in City* following the paper is an &-page discussion compiled by C* L. Pool which siHarlzes and describes typical methods for control of exposures in certain Industries* 449 BEYOND TOT THE LETTEt Of THE LAE.* H*J.fioberts. Occup. Hazards k Safety, l> 15-18* 28* (Hay 1939). The tread of court decisions is definitely towards application of the eoaston law, of considering an occupational disease the seme as an injury, wherever spe cific coverage has yet to be enacted. Cases are presented to show the devious reasoning by which the courts have made awards for industrial disabilities and to show management why it may ba wist to look beyond the latter of the law la determining its responsibility. Reference* to Recent Literature - 4 490 AT.T.AYTM5 DUST IN' BITOCIJOUS-COAL VINES WITS WATER. D. Barrington, J. I. Forbes, F. S Cash, S. H* Denny* C. A. Herbert, 0. J. Parker, C. W. Owing* and a. w. Hiller. U* 3. Bor. of Hinas, Tech. Paper, No. 993, 99 pp. (1939). For sale by Supt. of Ooeusenta, Washington, D. C. for IS cents. This bulletin describes more fully (see Abstract 116, 1939) the researches of the Bureau of Hines on the use of eater in reducing dust in coal sines. To pre vent dust explosions in sines both rater and dusting methods are being used in conjunction. The dusting cannot be applied within 19 feet of the face, and it is at this point where such of the cotdftdusts and gasea ore encountered. This bulletin esnorates the dust prodtwiAg?Sources and describes practical methods of us&g water as one of the aost^BseeHve methods of du3t in bli :cellest lUmstrlproa* sad sketches are Included. btcmTu its explosive qualities an Increase Fs claimed in soso sines, due both to increased visibility* 491 DZAOBSTCC tive Edltl; the Assocj This bnMl^fio outati nistrial opportunity to detect at a proper diagnosis, health but also that of )SIS or TBB LUNGS AND DES. Tenta- Losis Association, 1938* tolnable from W* 90th St*, New Yc 10th edition of presents simply and consider ln^dfeg&pxlig pulmonary tuberculosis. Lnes large-rcani wT worloen has an uimminl reuti Let should help him in arriving lee not only Improves industrial 492 TUB2ROXLOSIS HDBSAZJT7 IN IS&aSB&~P0PgUTX01B OF MASSACHUSETTS AND MICHIGAN. C* C* Dauer. Am* Rev* 1939)* Tuberculosis mortalitssrajgp DavV'beon hi^ey In four Massachusetts cities than In a vial 1 nr grot^ottappzwdmatoly^tho ssme^dlzo in Michigan* It appears that the difference i&JMtsiity in the teargroupn^^ cities can best bo explained on the basia^ck*qri unfavorable envtaBrautal^4& social conditions in the Mnssachua^rs^roups. It also appears^f&t indirectly the composition of the populjti^b^with respect to nationality hms^syemeeme part in thaea differences The paper includes tables sj^^natlerc^ which describe the data age groins, type of oecupatlonx^i^slty^^sppulatlon and housing ____ ______ _ N^^)j _ ____ REPOST OF TEC DSPAROtOfEAL CnHITl'Jtt; CN CQMPBGASS^ FORWARD BOOM VOHOSS. H* M* Stationery Office, London, 1939. The Committee was appointed to consider on equitable^smpensation code for card room workers in cotton mills* For a long time it warn tfitaght that there was so specific disease among the operatives which could be thejsntojeet of precise clinical diagnosis, but the present CcKUtee rec^meadA^p)permission of workers to apply for compensation for a respiratory di*eaifemed "byaainoais," after having worked In a card rocm or cotton blowing room fS?20 years or acre. It it now thought that a special medical board is able to arrive at a definite conclusion os to the occupational origin of this disease, which re*bles bronchitis and smphyssma and which is presumably characteristic of the occupa tion* 494 THE JLOW OF AIR AND ITS DIS3SIBOTI0N THROUGH DUCTS. PART 4* DOST LAYOUT. J. R. Zwlckl* Seat* kYcst., 36, 48-90, (May 1939)* See Abstreot 378, 1939* This paper discusses the methods of duct layout and design besed on technically correct methods* All sections of the system are first calculated as equivalent round ducts and then their equivalent rectangular dusts substituted. If necess ary, to fit tbe structural requlrneats of the building* The designing is based on the flow in the selected main duct and branches are calculated es percentages of the main*. Equations for caiculatingduct sizes and head losses ere included and explained* References to Recent Literature - 5 (C) Papers on Industrial Poisons, Cancer. Deraatitla. etc. 499 BSSPXRA20K? HAZARDS 07 XLBCTBIC ARC WKIHG. 0. A. Sander. lad. Had. 8, 177-80 (May 1939). Twenty yoars of electric welding experience seam to indicate that the operation is not a hazardous occupation provided the fume concentration is kept below a certain Level* This danger level appears to be higher than the concentrations of foea usually encountered in aodeafely large and fairly well ventilated rooms. A great deal depends upon^tJS^iAteriala being welded and materials in tha weeding reds. Hewer type* am^Mnslnually being developed and care shot be in tha Use of thA2cmagr the newer materials are manganese. of lead poisoning is of conaoquence lag Welding should not be dona in confines sweets le o] rentilatlon even for short periods of^OTwi^Mn nufac- of night well consider a progrA of rbaoa&n in the ofN by the newer electrodes; a prq0fem3&thls sort would ital industry. 486 SEAIi L7S. 187-94, ?39) it nay ha saf shat oil. s nay be potentially toric un less definitely known otl ited that any ehAical naterial, however toxic, can be le degree of safety if its toxicity is known and tha iadicat a are followed. The author dlscuss- ea tha hazards of toxic portala of entry into the body, the chemical and physical sta; rch Aents aet and the organa generally affected. A program 1 tha loown hazards and for eval- uatlng the unknown 'of nasr, The latter generally involves leaghthy e , uws.utirar illiyjr* With to deteimine acuta and chronic effects. A tective neasu^ikfo use of toxic materials is includ- ed. R. W. G. Davis. ChA. & respirator is applied to any d lotion to the respiratory organs of t __ ttnd (applying particularly to chAlcai^aejM) are offered for the guidance of those who are^billed equipment for vaiiue chAlcal processes. c-^ (April 15, 1939).(British) e designed to afford uses and limitations of alned. Suggestions select and provide 456 GASSING ACCIDDiTS. S. H. -Wilkes and D. Matheson. Chafe fc Xnd. 98, 316-23, (April 19, 1939). (British). The authors, a* inspectors of the Factory Department th^teland, hove tabulated the reported gassing accidents that have occurred during past six yoars* It is shown that carbon nonoxide produces far aost accldeatb^fnA any other gas, almost as assy as all others combined. other gases anoount^ed are hydrogen sulfide, sulfur dioxide, chlorine, nitrous fiaes, innl s. benzol and trichlcr- etbyleno, to Motion e fit. Accidents are cluud as those due to "expected" gases and as those due to "surprise* gases, sad som of the aost serious acci dents ero caused by the letter in locations where the gas is not manufactured or handled, but is generated or encountered by accident. It Is noted that chemical works do not produce a high proportion of the eceldAte, end that nost are in the iron and steel trades, particularly the bleat furnace end its associated equipment. Lenghthy descriptions are given of certain general precautions to be followed. References to Recent Literature - 6 459 WAS OASES AHD IND0SIRIA1 HAZARDS IN THEIR MANUFACTURE. E. H. Colo, J. R. DriTcr, S. S. Bowen and 0. Cooper. Arch, Dexmat. k Syphilol., 39,, 45-54 {January 1939). The authors were consultants In a factory in which diphanylchloroarsiae (DA), ehloroacetophenone (CN), diphenylaaine-chleroarsine (HI), dichlorethylsulflde (OS Bustard gas), and pbonyldiehloraraine (starnite) were prepared and which act ed as irritonts on the skins of workers who were exposed. The procautions and treamonts in the use of each arc listed. In general, the authors suggest the following prophylactic measures: (1) abeolute cleanliness in the plant; (2) change of verk clothes every 2 days; (Zk careful washing of hands and face before each seal; (4) bathe and change to stnet clothes over? night; (5) use gas masks in aljNoperetions where exposure (*^fcangErous gases is possible; (6) with all proraja except Bustard gas, the wtouiag of rubber gloves and a Bustard 3uit< (?) iBgniate treatment ofsroSjs ejected by DA or 01 with fresh solutio*ftf< sodiua wpochlorl^^ A&&J$pict*<i by C3T should be treated with lO&^fcutfct of sodiua dcafbonat* ' 460 THE DB'JflCTli AHD VAPORS IH INDUSTR. Cham. k Ind., 58, 1939). (British) . The sensed ihavior of sniaals are b {able as general methods >nco of traces of is encountered in many i^dflatrM atnoi for slaple, .-quantitative tests, swuatrTM to very suitability of existj >na of gaqgg icusi l^mpors is pointed out, and the icrlptlon is givsn of such a method for the detect!^ of which have boen published by the Dept, of Scientific tsearch (England). Those published to date have referred to 'hydrogen cyanide, sulfur dioxide, nitrous fuses and benzene; all hnvex La, these abstracts. 461 ihs ToxxciTr op o: .,t$* Mc^gein. Own. k Ind. 58, 339-42, (April 15, 1939) Acute and chro ng by vapore^nf o solvents an described and ex- aaples of poJ n aan are givea^^The o has been to stress the danger not to high concent ' the less frequently under- stood. exposures to low concefiggflons earor realization of these do such towards the applicatimrof in the use of these sub- in-industry. jLorzhetric DsnsamiAXioH op hemoglobin as _ TIN, BASED OH KANT IHSOgTRIAL-gSDICAL BOARD TCmWTI' _ OR AS ACID HEMAHuaperdinck. Deutsch. Arch. f. kiln. Had., 183, 379-86, 1939) (German). In two-thirds of 400 series of blood, the imnoglcw5?ynlues by Burker's hamo- globinoaeter end the Zelss-Ikon hoometer (acid hmwa^were in agremeat. Occasional aeid hmatln values differod greatly from ^^e^by Burker's method, probably because of wide variations in the course of fostinttoa of add hematic. By Burkar's aethod, abselute hcaoglobin contest per erythigKEte showed very little variation in the 400 subjects. Of the total nmberf^Sjt had 5 to 6.2 Billion erythrocytes per cu. 463 CHRONIC CARBON MONOXIDE POISONING AHD FERHICIOOS AHB1ZA. 8. Bledeznenn. Folia Haeaatol., 61, 166-200 (1936). (Italian). 1 A subject repeatedly exposed to carbon nonoxide developed hmatologlcal and neurological syaptcas indistinguishable from those in pernicious anemia. The rapid regression of the neurological signs under therapy lend the author to re gard the signs of pernicious anemia as syaptcaatlc consequences of the carbon aonoxlde poisoning, rather than as indicators of an independent primary perni cious enema. It is suggested that some apparently refractory cases of perni cious ansma may be due to unsuspected, repeated exposure to oarbon aonoxlde. References to Recent Literature - 7 464 HETHDDS JOS TBS DETECTION 0? TOXIC OASES IN INDOSTST. NO. 5. UTIBOOS POKES. Dept, ot Sol* fe Ind. Research, Great Britain. H. M. Stationery Office, London, 1939. Nitrous fuse* are usually reddish-brown in color and consist of a mixture of I2 a2id NO4, with possibly traces of ND. Dangerous concentrations any be en countered In many important Industries. They are also encountered in connection with electro-plating, engraving, metal cleaning and photogravure processes, are foxmed during osy-eeetylene welding when the flame plays on cold steel in a confined space. They have caused fatalities during the heat troafiwat of metals in oolten nitrates. In ths test deHrlbed, one of a series for usa by unshille; . ths stalls is pumpe^^Sfcst9& a solution of a*naphth&lens and sul] Id in acetic acid by_a abaSard hand pusp. The amber of strobes se-pinb color detszBines the coaeentratlc port in 100,000 (0.03 ag./l). Detail^vuqperip- preparntions of tha reagents and ssmp2b it hods are 469 'ATS? IN GABBOK MONOXIDE F0I$$qpffT T. r. Bsli and 92 (1936). two cases of "relwc&Eb carbon monoxide poisoa- iTo lesions the deeper cerebral effimsa are tha basal lesions. Of special interest is Lmbftening of tha globus pallldus in these cases since thl t pathognomonic of acuta carbon mon ofi.de poisoning. Aft lesions ccmcnly found and reported, the authors discuss tha which have been preaented to explain thoir development* They union that no single theory seems to be adequate to the action, of this gas on tissue cells, and that probably r. Anoxemia, specific vascular disturbances, uliar blood supply in specific parts of the iculorly in the are believed to act together in producing logical lesions fcos>und. 466 rAH0NS OK TEE POSSIBLE 07 OBTAIN 07 THE C2LCR- 1CAHB0HS WITH S0GGS5TI02B iNCSfTRAJIONS IN TBS AIR C* E* Drinker. J. lad. J59JSV U, 156-9 (Kay 1939). Jeriaents on tha tofioity of these ..a<$9^continued and are report- cd in tha paper. It is veil known that a ch t^calci is effective in preventing acuta atrophy of tha liver from exposure to'>ggyhon tetrachloride. Tc discover whether caldm in the diet would prota&^gainst liver damage from a toxic chlorinated hydrocarbon, two group* of ratk^wery fad diets of high and lew calcim, respectively, end subjected to inhalation high concentrations of a mixtiffe of peata and hazachlonnphthalanes. It was uti|that % calcium diet has no protective effect against the character!stxcjivar lesions caused by these compounds* To check a supposition that xanthine l$[$U&loa* reduced the toxicity of these compounds, another series of animals weeHxpoeed to tbs vapors, and part of than were given xanthine in addition* 'fib differences in the effects ware noted* That the chlorinated hydrocarbons are broken up within the body was proven by a significant increase in the urinary chloride following inhalation of the compounds* Included in the paper is e list ef IS of the im portant compound* of this series showing permissible limits of these substances in air. Host of thm contain from 43 to 68J( ehlorlns; the limit of all with but three exceptions, is.0*3 mg. per cu* meter of sir* The exception# ere: trlchlcr naphthalene plus a trace of tetrachlornaphthalene -- 10.0 mg. per cu. a.; chlor inated diphenyl -- 10.0 mg* per cu* m*; and tetra and pentachloraaphthalenes -- 1.0 mg. par cu* m* Eeferences to Beceat Literature - 8 467 TOSC EfJSCTS UPON BABBITS OP PIMTACHLORFHEMOL AND SODIOM FIHEACHLORPSENOL. R. a* Kehee, W* Delchmann-Cruebler end E. V. Sitalllor. J. lad. $rg* & Toxicol., 21, 160.72 (May 1939) Pentachlorphenol is used coBercially as a preservative for wood and wood pro. ducts* Since manual handling of treated limber cannot be completely avoided, experiments on tha material wara earrlad out to shade the reported toxic proper, ties of tha aatarlal* Tha substance Khan dissolved la capable of penetrating tha shin surfaces and tha investigations aada with this in mind* Pentachlor* phesQ^ as wall as its sodium sal>^tii*?&bsorbed into tha tissues (cutanaousl: sa&eousj in sufficient qi .ty, produces an acuta toxemia. The doi ad cut#bualV, varied, depending on tha aolvent^ftg^a^; it (is pine oil) to 380 mg* par kg aoi tally usually recovered fully with! cation that tha absorption of re lisosisg* It. is stated, however Ion and for this reason tha as 468 or DZRT7ATXVSS S* 0* Calvary, S.J. a Toxi '17M0X, (May 1939). ^excellent paper ts >ugh, tha literature and reports on an axtensive series of compounds in detexmining thslr toxlclties* Over 2600 a tha tests and tha aathods of statis- tleal analyses employed resting. Aftsr eorrelating tha in- formation in the literature .ts of tha experiments, it is concluded that ethylene glycol, dl lens glycel mouo-ethyl-ether, di- ethylene glycol ao; hould ba entirely emitted from food and drug preparati should ba avoided except In very small concentra PATS OP ___ IK THE 0 a? NC=> tt and J* S* Johnston. J. 768-70 (March 193 as identified in t which repeatedly inhaled doses of trichlorethylaae* as a conjugated pro. may possibly be a decomposition complex unstable und actually excreted* There are Indies sms notarial is pre- in tha urine of htaans exposed to trlchloret^Lane 470 TBXCBLOKSrBZUBB SBUASSO TA1S5 ASD TSSCB 3A7B V* B* Harris, C. 3. Ford, P* A* Patty and T. Hatch. Indust* Bull., H X* .State Dept* of Labor, IS, 132-4 (Uareh 1939). . This paper gives tha results of a survey of SO plants udlflfJtrLchlorethylene degreasing tanks, with a detailed surrey of 18 of those studied* Saccsendatloas are aada for tha design of equijawnt, location of eqoijmant^^cal exhaust vea- tilatlon, and operation* Dimensions of tank and root, quantity of flow and ret# of flew for adequate ventilation are given* Tha exhaust ventilation should be applied laterally at the edges of tha tank since tha heavy vapor tends to roll over tha edge and fall to tha floor* A ventilating rate of 60 c*f*a* par foot of tank perimeter has bean found to ba adequate* Thin produce# an. air movaasnt of approximately 20 f.p.m* toward tha exhaust openings at a distance of one foot from the slot* It is necessary to keep tha rate of air flow as low as possible to astntnjn efficiency of control sad to prevent too large losses of the sol. vent* References to Recent Literature . 9 471 TBSACHLORKTSaag IN TER TRttATVWfr or BDOSNOBC DISEASE WITH SPECIAL REFERENCE TO ITS TOXICITY. P. 8* Fernando, X. d'Silva, G. X. B. Stork tad 0. R. Sinnataaby. Indian J. Med. Rea., 26, 759-83 (January 1939). (India). Tetraehlorethylene, studied in 111 patients, was found to be effective in expell ing hookeozms; a single dose of 8 ce. for adults will expel 100 (as many as 510 wozms) but has little effect on round woxss. Careful examination of each patient was made in order to check the toxicity. Several liver tests were employed. No appreciable to^c effect on the liver was noted in any of them even in those re ceiving double the maximum adult doep^fn general use. No depressant effects of any importance ware noted and no tepno^ction on the kidneys. There was occasiaflaingiddiaeas. faintness and memmese but theaa were only temporary. A of d^eZ^ia thg^flmet effect!**. burtons of 4-5 cc. oan be given to adult; oa cjjilted are also discussed. 472 POISQNDO IN THE CAT. s or L. Stewart and JL C Path. 26, article in this s Bo. 796, 1938. divided into The first re- per kg; ecood group, one or sore dividod. Two weeks trachlorlde as Croup I* Cats als and the changes noted, second group in the first 6 days end of 6 days, tha Croup XX livers igns of extensive residual damage in lllrublnala, retention of bromsulpba- se with ligation of ducts. 473 COMPARATIVE ACTION ON THE VASOMOTOR SYSTEM OF ANESTHETIZED D0GB5? V^harllor and Aagegot Ccmpt. Rend 3oc. blol., 130, 779-82 (1939U5ch). P '' NSW RESMOTOt SB TOXICITY OF 3SSBSfc&/ R. Arch. Intern de Pharmacol. et Theati&'4gr 123-83 (February 1939)% describe Oautrebaado's eoTk v#m) cal effect of "crystal- cccmercial benzene* on the central tha parlpheral vaso- system and the ^ocardium, and presant^tWurei similar research on ) tha toxicological effect of chemically purejoan2ei ) a comparison of tho effect of cooMrcially and of chemically pure benZhns, (3) the origin of the greater toxicological effact of ccsmarcially _ ~ Experiments conducted on threa organs (heort, intastlnes, and vasasotor showed coemerciolly pure ben2ene to have a greater toxicity than cbemlci e benzene. Research was than conducted to detezmlne the ccmpounds which ci _ this result. Follow- ing the frnetionatlon of commercially pure benzene into* rtaat groups, it was fotad that the fraction boiling from 80.4 to 81.2C. test toxicity, greater than pure benzene itself. Further studies of this tion and of the impurities in the substance are to be undertaken later. 474 SDLTOHE1TED HZDROGEN PSOIXJCZD BY BACTSRIA IN A LEAD MINI. J. W. Sdington. J. Hygiene, 38, 683-7 (November 1938). (British). Smarting eyes, markedly congested conjunctivas, end a stinging sensation in the nose and throat ware found in 12 workers in a lead nina. Tha strong mull of hydrogan sulfide in the port of the mine where they worked was traced to the stagnant mins water in which there were sulfur deposits. 3plea of the water yielded great mmbers of bacteria. Improved ventilation eliminated the trouble some gas. Raferancs to Raeent Literature - lo 475 QfTOrCCATXOMS B? SBiZBiES. M. Duroir tad H. Deaoille. Presse med. pp 331-2 (March 1, 1939}* (Trench). . Acute intoxications, usually by accidental exposure to large concentrations of vapors, cause the same injury ae do other lipoid solvents. The first symptoms ere inebriation end vomiting but those disappear rapidly in fresh air. A more severe font causes loss of consciousness or heart failure and death. In chronic poisoning only tbs aromatic hydrocarbons of ths ben2n ring cause blood distur bances. Impurities play a small role and benzine does not seem to attack the blood. Methods of treatment and prophylaxis are given. If exposure cannot be prevented by enclosure of the processor adequate ventilation* some other sub stance should be employed. Last^brafte Trench Society of Btamatologlsts rej that where they are not indispensable, benzenes must be prohibitec 476 FAATTAALL' fors. During amounts none atrictlo: ular. there was ,, but on he suffered a again fall. This wa the slightest wamant. and the man died 6 hours the cheat). %TTER BREATHING- HfDRDGBT SQLTIDE GASES/f 85, 1149 (1936). (Oexman). <61*^ n sulfide gas the patient inhalmd^mSer small ugh others in the laboratory cspQw3.7 exposed, The patient had a dizzy spell iagMffered chest con ' had Irritation of the tMjot .cough, weak and irreglirmii 111 n i. jlftrnSfr. vomiting. The next vor was 126 ag.Jt. HO was orders end actively moving st pains and the blood pressure fever end angina pains wart fait at tment the condition became aggravated pectoris (serene constricting pain in 477 EARL? DIAGNOSIS OT OCCSSX _ KING. Strauhe. Dautsch. med. Wchnschr., 65, (German). In examining v^mjard^workers the author .ttempted to distinguish between arsenic absastafrw^nd arsenic pol ' .laves that those cases showing only hratfnrabosia may be conaidored^W euff arsenic absorption. The proa|ad^ fflSnsy pearls, that can on early stage by the use of fLfcCm$&Itraviolet light, is charac " .ttar* ZXFZKIUBirS OH UDO CHANGES AFTER S. Roploh. beltsschuez, pp 144-6 (1939). (German) The author, larestlgatlng the pne\monia produeii a of manganese, had rabbits and mica inhale dust containing 90 dioxide. Of 32 animals, 9 died within the first 19 days, all of which si ire or less pronounced bronchopneumonia. Of ths survivors soars were infect .tranasally with pneuac- cocci and half of that exposed to drafts and cold, survived, and it wms in these that the lung changea foi a of those infected most pronounced; those dusted only had no lung changes. Sines Thomas as pneuBoola la man also, a dust, containing 10 manganese dloAde to the slag dust. was used in continued experiments. About the aame results were obtained, namely, that those Infected with pneumococci showed severe lung changes, that in those sot infected the lung changes were not so marked. The author believes that the pneiaonla caused by Thomas slag can possibly be traced to the manganese dioxide. 479 NOTES ON BOBBING KITH HROld POWERS. M. Deribere* Ann. d'^g. Pub. Induat. et Soe. 16, 506-7. (1938). (Trench). Bronze powers, which are composed of salts of copper are used In several in dustrial processes* The workers, under the impraesion that these powders are poisonous, tend to ascribe any sickness they experience to this cause. Large doses of copper salts arc indeed poisonous; but sueh doses seldom, if ever, occur industrially* The cogger salts grs rapidly eliminated and do not sat up & chronic poisoning the body. Reftrences to Rscsst Literature - 11 480 Toncowat 07 7L0QRID6* A.* 0* Oettler and L. martrook. Aa. J* Med. 3ci., 197, 629*97 (May 1939). The methods of detection and quantitative determination of fluorine la body tissues are explained la detail aad the normal content of fluorlae la many of the organs la listed with both values from tho literature aad those found by the authors* Very nail amounts of fluorlae are found la normal tissues (20 to 80 micrograms la 100 grams) and there seams to be no epproclable accumu lation of fluorlae la any one of the vital organs. The fluorine content of teeth and bones Is higher* being of the order of 0*01 to 0*0356, which probably ories with the mount of fluorine l^jfhe daily diet* The symptoms of fluorine poisoning are renewed aad aa attsegt^jp made to estimate the minimum lethal Ingestion) Hot much ar^Jtion Is given to the lahalatlon of com; of 1 481 C9301CC Holler. TEE R02S2fTG2NQL0GXGAL January 1939)* (British Chronic fi estlgatlag discovered in 1931 whga\&i^dthor was inrs and came upon euffiy^agos la the boaee off, % t factory* hmcxroen recognized la Lae that the symptoms la iTfhe cter and included lack of t&k, nausea thfr^open air. I uwsn the ladMdu&l went Into S apparent toloreace to the dusts following eoatl ipol sign of fluorlae poisoning Is la bone changes, e bones. la the affected individ- uals, there was almost of noxmal body structure, the bones of the vertebrae it a milky white opacity* la the extremities, the ouch thickened and the marrow car Ities narrowed, ted after 2 1/2 years of exposure; more extensive ears* Another feature of the condition cone teeth* Thesa^tha inscribed as mottled teeth, have been rec ly all countries. Stated that because the occur- ranee of^ll&J&nSf Is so extensive York^efSjs^rytflite, phosphorite aad c 1 real dust problem. should, la particular, be extreme caution. It is impo: agists recognize tho la of fluorlae poisoalag, aad cert sts are given in the INDUSTRIAL CHLORINE GAS POISONING. ^ ergiftsf., 10, 1-2 (January 1939)* (Genoa). 'xxL A worker la a wall chamical plant was exposed to ns gas during the course of an experiment. Although he had broathed only a uat of the gas, he had to be helped from the room and then lost consdo At the hospital he developed n scute, severe bronchitis, and about 3 this seemed cured but it agsim developed a few weeks later* The bronchitl chronic and tho patient was troubled with an Increasingly severe cough snd^ftepnea. Respiratory functions were badly disturbed; vital capacity was only lOOCPec* aad respiratory misate volme was almost double the noxsal* The case is unusual In that non- fatal cases usually do not lead to this chronic condition* 483 0NX0H CONFERENCE ON L2AD POISONING* Labor Standards, 2, 58-0. (April-Hay 1939). The control of lead poisoning was discussed by the Battery Cowell of the United Electrical, Radio and Machine Yorkers of America at a meeting In Phila delphia on March 19* Aa outcome of the meeting was the appolamunt of standing caMlttees to gather detailed lnfoxmatlon and to conduct further conferences on the subject of occupational diseases* Reftrances to Rsceat Literature - 12 484 i THE EARLY DIAGNOSIS 07 ACUTE AND LATDTC PLOdSI. F.L. Stlth, 2al, T# I. Ratiwell and 0* S. Maxell* Am* 7. Clio. Path*, 8, 471-508TI938). Reprints obtainable frcm the aaolor author, Jefferson Medical College Hospital, Philadel phia, Pa. The many synptcas that may be found , in laad poisoning aro listed and mention is Bade of the diffaranea in susceptibility to lead. The authors review figures gives as normal laad is urine and concentrations in urine of exposed and poisoned parsons* In discussing the significant# of stippled cells, the authors list six teen dher pathological coaditionsJLJ^flUch these colls hare been reported* In the^JCatbor* s aeries and experlAea^Q^fTCppllag did not precede symptoas and the tost $eg^'' Reticulocyte response and basophil!* Ldered te as disgnostlo tests. Detailed bloc fcnts grouped according to clinical diffarentlal diagnosis can bo B&de<S2A7&ate , colls sad fibrin fraction when CHwttfired in re- alue. Thoir analytic method is 4Arg*xn normal sub- daily changes, had no t'^MWtole blood values, exercise* It is cant that, in nozaal in the aorta, b s of pluBbla, serun In chronic poisoning, values are higher than laad will reappear in the 485 THE CLINICAL SZOH7ICAHCS Am* 1st* Med., 12, 1429 The naan maber of stlp; red cells; in 234 petA*cb^ith Billion. Five p^an) to when after syapto&s sfttfmrsSf but 2250 up tq exposed to l^mw|prxree of syaptoss tration fasmatin to 2 pati 5250 arttNM3. These data suggest that diAdci&*? either lead absorption or 1 IN THI BBTHROCOT.E.B. Falconer. 5 normal adults was 92 per Billion cal conditions, it was 363 per .stared, had 19,950 par Billion toss appeared* In 8 workers .cell count was 2100. Adminiastlppled cell counts of a is not a specific ia- KBaZKERATIOH IN fiHBDGNTAL LEAD FOISdiafcPBr SOLUBLE LITER PAC- M* Lauro, 0* S* deSacy and A* Arthus* C^t^reaft^jjac* et biol., 130, 6- 4--2---4 (1939). (Trench)*. -.vr-_ A brief report of experiments on 55 rabbits given sx#lff<rorent liver extracts after anemia induced by lead* Regeneration of blood^agpn within 3 to 8 days after Istravaaous injection of the extract end reeche&^yfairly high but sub normal level. Control animals given oo extract recoverSB^ly slightly. Regen eration took place regardlees of aalaol'a age, duration o^^mtsent, aaount of lead injected, gravity of casBia and tine of liver injection^) 487 INFLUENCE 07 ACID AND AIZAL1NE DIETS ON PORPHYRINURIA IN KPERBCHNTAL LEAD POISQNXN3. A* Capellini* Med* del Lavoro, 30, 33-43, (1939). (Italian). Three rabbits on on add diet and threa on an alkaline ona were given 30 cc* of # solution of lead acetate daily for 30 days* Porphyrins in a 24 hr* urine sample of the asiaals on an alkalins diet was 90, 53 and 108 aiorograna. Tbs corresponding figures for the animals on add diets ware 187, 136 and 152, but la these latter, the. porphyrinuria dropped aore quickly when the lead was dis continued. References to Recent Literature - 13 488 LEAD POISOKDO, LEAD COKEHT 0? BLOOD AND OP EXCRETA* S. L* Tcmpsett and A. B. Anderson. Lancet, pp. 559-62 (March 11, 1939). (British). ' 'F- The lead content of blood and excreta of 29 cases of suspected lead poisoning ms deteiBiaed by the sodium diethyldlthiocarbo&ate method, certain Improvements in which are stated in detail* The investigation confined the opinion that the estimation of blood-lead is more satisfactory than the detetsaination of the ex cretion of lead* The upper limit of normality for blood lead is pl&cod as 100 microgreas of lead per 100 ml* When this limit is exceeded, or if there is a total daily excretion of 1 ng. or moatfof lead, than lead poisoning is present* Details are given of a large asBtaaT&^tazttinatlons made. The conccntratioi of JU4 i& the blood of tbeae cdaerfraaT ten to twenty times that in the urij Nevertheless, iVcaanot yem clamed that the chemical diagnosis of 1< soning^0iBfaii|j^e, e^a t^^igb it is surer than clinical methods. 489 Altar C* Mahr* Mlkrochw., 26. 1939). (< Lead can bex presence of other heavy fozsation of very ins< icific lead thiourea niti the lead-containing solutj kc a< '10 volume of solid is added* After dl-. coo, foSmition oi itals Is observed microscope. The lead nitrate pr^etbital doubly iedlelike prims, 20-50 mi- __ long and very Let asf^rtS)?crossed and frequently united in star-shaped bundles* lead earn be detected in the pre- sence of 60-70 parte b: more than 100'of cadmium, arsenic. tin. silver, platinum The metals of the menoaiia sulfide end alkaline earth groups do similar concentrations. The spocifl- city may be increased ab< Lous separation of the lead as lead oxide on the plat: " Lting concentration of lead is about 1:40,000* 490 PAD7TDC PR C. D* Bridges. 'S^ety^S&g^TT, 44-7, (May 1939). Thera Rdfc?ferent types of pa^gU^eiitt^ffixfactured by mamrous firms, and 'ingredients are used thatxCy^imroSfcle to determine the toxicity :s. The safest practice is Yif mlnjf^TTmer 11rtnni possible when type of paint or lacquer. Whe^QWing(M)Bta, exhaust booths are >le where it la possible to ploy thdeicyiption is given of the ratal principals of exhaust booth construction* exhaust ventilation la not applicable, respirators should be worn.Tbgy sSwd be supplied air res pirators, as this type is more efficient sad morejcomfortable for continued wear, and the air supply is convenient. The air Una be passed through a filter to remove fuses, dust, moisture, etc. It should be<^M^bertd that dust respir ators do not protect against fines. Paint daimatoseS^d^e to allergy to the var ied Ingredients, may be controlled by protective cloth^g^aad the use of pro tective skis Tim such as vasoline end cold crew, aal-raarentlng tbs use of solvents for washing. Paint brushing involves expeeure^o jizft solvents and re quires, primarily, good ventilation. ^ 491 MEDICOLEGAL COMPLICATIONS IN DEBCAT0L0GY CAUSED BY MASSAC3JSEXTS WOBDCN'S CCMPStSATIOH ACT. J.S. Slaisdell. Arch. Dermatol. 3b Syphilol., 39. 69-80 (January 1939). The author shows that the question of compensation is largely dependent on the interpretation which, since the enactment of the compensation act, has become evolved through practical experience. Be stresses the difficulties that arise for the dezsatologlst in testifying before a group of lay referees becauso :f the impossibility of always giving a definite Tee* or "No* answer. Es gives consideration to the use of patch tests in evidence before the referees. Follow ing these discussions are several suggestions for changes in the present law. References to Recent Literature - 14 492 COEAHBHB BSSTZ0I8 AMOBQ XSDG9XSXAL 101BSS. J. 0. Donning. Area. Daunt, Syphilol. 39, 12-92 (January 1939). The author presents a large bus of important data relative to industrial dexsa- toaaa, taken frcm a study of 2000 eases. Ee baa aany tables which bear careful study by those interested la the subject. Prevention and diagnosis of dexaato- sis eases are auch cheaper than neglect. A process should not he condemned as dangerous because one or a few workers are peculiarly sensitive. The largest saber of coses occurred in young untrained workers between the ages of 20 and 25 and the hands were the nest frcquanj&r involved area of the body. There is an interesting discussion of the distreMution of dexaatosos according to ocsupc- tions./WBd there ore excellent si^Qrise^of important contacts, oatorials us< and Wnayhcteriiti^ affacts in-tba ds4rierent occupations. In discussing tion taaea Upo] >f detocting and ellnl natiag hazards, importence of gloves, and protoctiv and little value in prs rnnploymant pet cusses proper evaluation of the teats as tlonal 493 DOS TO PHDTOSJKSITtS&ATIOir. H. R. Toerstr and ts^atti&tz. n^dh. > Syphilol., 29 uary 1999). TTnffll 'actorlea uai tar produets. Most of thd^pxtansous laalo: found s who handled pitch or pitch proouots and who Patch testa wore perfoxmed on 14 pitch workers and 4 ;ha different fractions of the pitch and tar, and the exposed to radiation of various wavelengths. Sane of the chMicai and physical properties of the pitch are discussed in del studies, the authors conclude that pitch desaatltls end She its of true photosensitization and not of allergic sens _ This photoaansitlzation occurs through local exoMnftriJhctlvlty tosensltlzer. The tests re vealod that no. praYftgar fraction of "the pi distillate of the tar can be hold respoufSgejpf the production o^^fiot cation. The most important radlatign^B^prt in the range of blue- ^ visible light and in the long^am&wdgths of ultraviolet light ( real) The aost active casclsomouic hydrocarbon in pitch, namely , which has fluorwscent 2900 and 3800 Angstroms, is prob the photosensitizing Lents. OIL BBNAXms. Anonymous. Safety Sag., 77, 49-SQ.(1ley^939). The article reports on seme researches carried otfTC&dazmatltls from cutting oils, about which the following ooncluslons are dramj>The oil itself is cot the direst cause of the sttn irritation; rather it is\^he^du*t and bacteria for which the oil fosms a suitable vehicle. The bacteria a^ri^t from the oil, but are on the sttn; all cutting oils are capable of penatrntSflJihs akin surfaces and the bacteria eater by this Boons. These bacteria olso^fxai^ entry to the sldA through minute, cuts made by metallic particles in *uspd|(on in ths oils. Prevention is best accomplished by thorough cleanliness. The affected ports should b# washed twice a day in soap and water end no oils or gasoline should be used to rwove dirt. 496 AIXALX 2CZBCA, ITS tSTOOBCSir AND PRETBfliaS, HTH SPECIAL RZTZRZSCS TO M0D2EK 9QAPS (PBACDEAV, SATZHA}. H.f.Schreus. Med. Welt., 13, 222-9, (1989). (Gexman). The author considers that usually in hypersensitivity to alkalies, no reel sliergle hypersensitivity is present, but as iomediate sensitivity brought on by chAleal sad pfayslco-chMieal reactions, only prolonged contacts are invariably effective. Since ****** icimii are only exacerbated by alkaline soaps, special alkali-free soaps such as *Pracutan* are recemnended. References to Secant Literature - 15 496 CHRONIC GRANULOMA IH IHDCSTRIAL BB9CAI010GT. H. X* Miller. Arch. Dezmat. ft Syphllol., 39. 33-44 (Xanuazy 1939)* la 3000 petienta examined for the industrial responsibility of their nation the author fotmft 26 with chronic granulomate of which 16 war* syphilis, 9 wore cutaneous tuberculosis, 1 blastomycosis, 1 actinomycosis, and 3 war* leprosy, the role whieh each plays in these cases is discussed briefly* When chancres develop in the sites of Industrial injuries, the carrier of insurance mist pro- wide treatment. She localization of lesions of secondary syphilis is rarely in fluenced by truss, but the lesions of late and latant syphilis asy often local ize on the sites of injury end will therefore be important la the evaluation of Industrial dezmatoses. Miller warosSfaraiciaaa diagnosing treating Indus- triaXvdaxmatosee to be on the 1tuberculous chancres since be belli ttt^ljipldsnee will rise inJh& fwf^m due to the definite decrease in earl] moi ' TEX IHDCSTKIAL GBCASOSES. 1939). records will provide a means fo&gitt&Eftng the inci- .dezsatoses and relate such isdleesfliiroceupetlons or .oyment examl nations mattr to afford an oppor- to reaction type atie'fW*'* the physician to ad- author discusua\mip<or the important practical rkera whn<wSt'4aely to be exposed to dexeato- 498 smmns nm Med. Assoc., 112, 2132 Nicotinic acid has been from ita specific eff< sensation of ministration. that nicotlal persons _ capable of Stn nicotinic aci^t all of the 4 cases of a slid sunburn cases the condition subs! of the workers experienced these COTZHIC ACTS. M. Watrous. X. Ax. comparatively inert substance aside Patients have, however, noticed a following oral or intravenous adstories are presented which indicate ent dermatitis in certain the course of their nanufacaffected ports of the skin and itching sensation, tvo. Only a small pro- ASEFTIC NBCRPSI3 OP BOMB. I. INFARCTION OP BZSSASX KE5QLTZ2K ZH SCAPSULASXD AS) CALCIFIED ARIAS XS DXTOWANS. S. C lahlstrom, C. C. Burton, and D. B. ?bed ^Surg., Qyn. ftObst., 68. 1u2s9w--4e6o (yFseboruary 1ix9a3s9i). Caisson disease (oppressed air disease) is the reinlt=of tissue injury caused by nitrogen which cornea out of solution in the blood^aifchody fluids in the f01* of bubbles following too rapid decompression after expires to increeaed pressure Because of the greater solubility of nitrogen In fata, ti^Ltissuea with a high fat content are sites of predileetion for bubble foxsstloS^)The tendency for bubble fozmation to occur in the spinal cord, the asms, sd the subcutaneous tissue la thus explained and bee often been described. Sowwver, with the ex ception of a single ease, reported in 1888, thne la no report on the patholog ical findings in the bones and joints in caisson disease. The present paper describee 4 cases of compressed air illness In which extensive bone end Joint changes are found. The cases are well presented, with complete case histories, x-ray and autopsy material, and illustrations. Zt is not improbable that as a result of the findings, bone and joint changes attributable to this disease will come to be regarded as a ecmpensable occupational disease, and acre attention will be paid to the prevention and early treatment of the condition. References to Hsceat Literature - 16 900 CCMFRESSBJAEH DISEASE IK BUILDING THE BEECH ACTIO HOAD "HAmBHOCKMIEDEl" AT TBB 3BVSBBB TAHBWT 07 TBS BBg.TK RING. R. Eoaig. Munch. mad. Echnschr., 86. 370-3 (1999)* (German). Tii# author. At permanent medical supervisor of the cooprossed air work which reached a depth of 30 satart water gage, was always present during construction. Ha praaants thraa lstsraetlag case histories and goaaral data oa tha symptoms obaarrad. It is of interest that in reca&praasion, improvement took piece at 2 to 3 saters water gaga. 901 MEDIA: ITS AILE7IATI0K OK Bf TBB IKHALATIOH 07 3ELXCM V* B* Lovelace, C. W. K. Boothby*. Proc. Staff Maatiags c, 14, (7a *w) a complaint of alrplaaa pilots cad ia descent in flight. This is duo a which causes it to toad to nsal&^dllte'Sd' unless efforts or other measures opaa it sa of equalizing pressure in thjraijPSe ear. It has that heliia-ojygsn niztoss pwttnt or greatly dl- auggastad that, InL^fiHupnes equipped with in- especially^ aiztures be inMnSB nnac narked ohaagas ia 902 IBDmjJUAL PARIAHO TO HIGH ALTITUDE. A. Bays, B.H. W. Matthews, V. 8. Torbeg/ Proc. Boy. Soc., 126. Series B 1-24 (Septmtter 1938). { Individuals differ nark' ty to adjust to the rarefied air of high altitude, and this related to a nutter of neasurable characteristics at sea- aozmal nan between the ages of 29 sad 44, habituated t youth, alow pulse, lew-normal blood o^rgen caMeffe^^bw alveol -omen o^de prassurn^^pgh alkaline resarf^> at natizatlo^tfi&rnltltuda. It is , high alToolar-carbon di al are favorable for accll^ careful cbeervatloa over a nmbarjaMnr=fly trained observers gt *.bet$e&4ndieatlon as to relative per$g^^o^br acellnatizatlon than any a yet devised. COK TO TBB MBCHAHIfM 07 ASAPCA2& ac TO BEOB T2KPERA- ^ S. P. Sharovatova. Bull. Biol, at "(Hussian) u 6, 671-4, (1938). Single or repetitive exposure of dogs to heat ( gastric secretion in response to a particular food stisulus, and the orguiic components of the Juioe; the iaorganio components zmained prao unchanged. The ob- served oheagea indicate the participation of both ths^nedpe-reflex and neuro- cheuical regulating syvtss. ^X^> O) 504 HEAT 9E80D i ATJ.TP COKBrnOKS. T. B. Kichnlls. X. ^gpy Mad. Corp, 72. 73-64 (Pebruary 1939). (British) \s> A review of the subject, written especially for easy nan in the tropics, The use of salt in the author** group reduced heat stroke to zero. 909 QBSnrmOB OK TSX BLOOD 07 10SKBI EXPOSED TO BEflB TMFBAIUBB. P.L. McLain cad B.3. Montgomery. J. Clin. Invest., 17, 417-22 (1938). Observations on a control group of 43 workers in hot industries and 30 patients admitted to a hospital for boat symptoms. In the latter group there were 17 cases of heat crwpe, 4 of beat exhaustion and 7 of beat retention (stroke") Careful blood tests were made; in the controls there was dalydratlon and fall of blood sugar folioeing work; in tha patients, tha changes depended on the type of heat alliant involved. References to Recant Literature - 17 506 fiEASQB AKD VSKCXUTBtt STSTBCS FOR FHTSICAL COMFORT. A. Bindley. J. Xaat. Beat. ATant* Xogrs. London., 7, 36-42 (lurch 1939). (British). In this short paper tbs author give* aouxid and interesting discussion of beat ing tad ventilating systems in relation to husan comfort. St regards as tho main essentlals-ifor sedentary workers in Grant Britain), a tsperature of 64 to 68?.a moderate relative frigidity, clean air, and adequate air movement; ha later refers to the desirability of variable air currents rather than a uniform and monotonous rate of movement. The>author concludes that, in Great Britain, except for certain industrial purposi air conditioning is overrated, and that the sir washer and refrigeratordispensed with, substituting for vet lotifflg purposes only a largegvoiVjp' of fresh air art making provision fo; air merchant to bjKHW ** required, 507 FHDTB* Deeembi Over 7600" during 193j aant for/ prev< viaora( various operations appliances are glv< Borne Office, factory Departme, sware reported to the factory Groat Britain tents reported are probably causing disable- k total number of eye aci .ts'Tb not loown but this >rhood of 100,1 The leaflet deals with .dents. ad portable), hairnets, to, and the requirements for inti* the maintenance of protective SOS CHDCICAL MCSCLE CHARGE' mod., 17, 76-86 (1939). In eniaals experiment finds deminaralinatlj alia, and potaasj after tho end to eleei 'C TBAIMA. G. Montsmartlni. folia ted with an alaetrlo current, the author and alteration in calcium, aagne- iun to normal, however, some time 8T , G. Allsop and R. 7. Iastn. Min. Bngrs. Len4r*\ 96; (fabruory 1939). (British), ;s hare clearly aatablishad mixtures can easily ba by tha rubbing of blunt pick , ek-^B^against pyrites, and it >ught that tha mechanism of tha ignii u Uhdsr tha rubbing ttion, soma of the pyrite is redu haatad to between 200 and 300C. Within thia range of tspers' t&t^on of the powdered pyrite procseds rapidly and ultimately fls (b sulfur) appears. This flame ignites the firedamp 510 DOCDMffltS Of OCCBFJOZQKAL ANTHRAX. Med. du travail, * 48-66 (1939). (french), French rules regarding compensation of anthrax as an its former compensation as an accident, are reproduced tional disease and )( soussed. Instruc- tiona for tha prevention of tha disease are also InBludefl^jjne author reports on two oases treated with serum and with fomentations of septoplix (paramino- phenil-sulfaald). S also mentions eight other cases treated by Murteanu and Zaltaan with other sulfamida. 511 PBOFHZ3UOXS Of MOORS' AKXLOSTOMXASXS IB IB* LOIRE TAILS. C. Gorin and 2. Roman. Ann. d'hyg. pub* ind. too., pp. 56-66 (February 1939). (french). Infranee, miners' ankylostomiasis (also called miners' anmnia or tunnel anmtia) la a ccmpanaable disease. Zt can be prevented by keeping the nines as free as possible of worm larvae and by axninlng and treating the workers. An intensive References to Recent Literature 18 effort nu made la two state ployiag 4900 sen* The percentage of infested qen, varying widely Ow pit to pit, was found to react from I9fi to 6SJt. of th* la* fostod workers treated with tetrachlorethylene( 89$ were entirely freed of pare* sites; chenopodlum oil ead thymol were aot aore than 50 effective end quinacrine was useless* final examination showed the infestation to hare dropped markedly in all groups although it had not been completely- wiped out* 512 WEIL'S DISEASE IB COAL MEHKSS* * S* IS* arlt* Med. J., pp. 603-3 (March 25. 1939)* II* CLOBCAL PAX3DL0GT* en* Ibid* pp* 605*7* (British)* The prevalence of Veil's disease aaoni^S3kth Vales shown by the sis cases reported toms were typical; jaundice, &ej and uscular pains* One of the cases was fgj diagnosis base by serological investigation and di agglutin* 'eptosplra* Laboratory iBvestigatlons<g$i\e^ out in tables blood ezaminatlOBS, blood counts, flmlnfiexBBlnations, tests : Vassesmann reactions, animal .l^nlmfton experl- meats t and the presence of urine wroln, urobilinogen and worked together and enwrxla in wet places in- feet c taken to rid thfwVfir of rats, as no further 513 SPIROCHETAL JABHDICX OP A 7AEAL CASS IH A IXSS MBCBAMT* M* V, Uton.' _ 219-23 (March 1939)* This is said to be the eii from Veil9# disease (see Abstract 433, 1939) in this eemtry* described along with vary careful laboratory tests* Urine .tient's admittance to the hospital was injected into a jaundice on the 12th day and died within 24 hrs* On ; to be swarming with typical leptospirae, wldcttNM^ spread liver and vara abundant in the /tuoular opithpl^Sw^Xjtocond guinea pig, ted with the urine of the first, also (Sai&^Klaroseoplcally n^jpLso were visible in tho patient's urine thsrguinea pics' blood or *UESCOCr SCBCPTXBniTT 07 ntoxxQK ntro&r* carl and P* V* Zlamszmsn* Contrib. Institute* 10, 135- (Januory-March 1939)* From a review of the literature and new experagptal knowledge of the action of sulphur dio^Ae on plants has been increased* of the conclusions made are as fallows: (1) plants are more resisted phur dioxide at tm* peratures below 40F*;. (21 resistance generally with an increase in tbe relative hattdity, (3) plants grown with an of water are aore susceptible than those with an Inadequate supply, (4) grown in poor soil are aore susceptible than plants In good soil, (3) in light intensity (as a heavy shade) below 39% decreases the resistance, young plants are aore resistant than older oaea* A second paper on the is to follow at a later date*