Document g2qLkQvpoGk7pZa7o4LEVoprJ

CERAMIC ABSTRACTS Compiled by The American Ceramic Society Ross C. Punor, Editor Mask J. lUscum Exxly C. Vak Sototcx Doxotev J. Tcxxrx Aznxiant: Committeen Publications: J. D. SoiwyaX, CWnnoa. E. ss F. Cuxns, R. F. $***trooo, * W. W. Wrxsiw, R. C Pvxsr Volume 16,1937 Abstracters* J. B. Austin. A- A. Ayars. Rudolf Baru. A. C. Btun, Deridas Biswas. L. T. BrownreQler. W. H. Bruckner. F. P. Budalhoff sd E. Stefanowsky, J. C- Cbaston. U\ M. Coha. JI. v. Cosdoide. Maurice Deiaajre, R. W. Devillers, A. H. Emery, VI. F. Fixe*. W. D. Foster. T. L. Callup. J. D. Gat. P. E. Grom. Max Hartesheim. F. G. Heck, R. A. Heidi. E. B. Hewitt. J. N. Kill. G. M. Hutt. 7. F. Hyde. Herbert Xasley. C. B. Jecai. B. Z. Eaaich. B. E. Khikulkia. Seiji Hondo. E. H. McClelland. F. P. Peters. G. M. Petersen. C J. Phillips. J. G. Phillips. R. H. K. Pierce. Jr., Alexis Pincus, Katherine Reed, H. K. Richardsoa. A. B. Searle. Stanford Setchell, M. C. Shaw, G. R. Sheltoo. H. E. Simpson, A. P. Sons. Erich StenseL H. H. Stephen* son. A. G. Siens, B. H. Strom, L. E. Thies*. E. J. Vaehuska,F. E. Vicrewyck, F. J. Zvaauc Editorial Ofiee: 2525 North Ex(h Street. Columbus. Ohio. Publication Office: 20th aad Northampton Streets. Easton. Pa. . 1G. No.<i 1937 Chemistry and Pkysics^-Cmenl 137 jrffwyyw^ 1 Ktrem. G*x,j dcteraiaiQfj implified 4* detail. S* 2-J.V. fa days m. Zesd \B. & f aluminum * Jonr. JU ): ILF. 957. re eesTotei ' The* wt oxide. A1A value for tit 0.002. : RJLH.: eat, H. t 935}; CJ**. bees plotted s a ternary diagram. These results ^ow that the pigment* of the best hiding powers were pre* ptrti from solutions with a titanium dioxide concentration fjinae between 13 and 19% asd ratios ranging from 1/1 :o 1/0.55- Seeding opalescence occurs at different hydro* ^4os concentrations with different concentrations of jafaricni. Illustrated. F.G.H. Viscosity and plasticity of disperse systems: VX Ef fect of temperature and electrolytes on the plastic proper* Sts of kao&a. M. ?. Wcumowmai ako D. hi. Tot* not. XoOoid-Z^ 73 (1] 92-96 (1935): - sec Comm. Afa,, IS {3} 101 (1937). vu* Plastic flow fa an apparatus with cylinders displaceable lengthwise. D.M. Touror. XoJ73 [1) 96-101 (1935).--A method for determining (be flow resistance and shearingmodulus of high concentra* aon mineral suspensions is described. The apparatus was designed particularly to eliminate surface gUdfag of .the cylinders. Results agreed well with those obtained by the nesting cylinder method of Wolarowitsch. At very rmn velocities, Bingham's equation for plastic flow does not hold for high concentration mineral suspensions. For Parts I-V see Ceram. Ait,, 15 (7] 2=2 (1935). FJJ. PATSXTS Alkali riEcate. Axotxs E. A. Coilveuvs (Helios g--Fabriker A.-B.}. Swed. 80.000, April 4. 1934. CW Aks~ 29, 6000 (1935).--Steam is blown fate an electrically heated bath of alkali silicate formed by .the reaction of alkali chloride and SiOi. During the proem the bath is kept covered by a layer of the unmelted charge of alkali chloride and SiOt. with or without another substance. e.g.. Erne, for the formation of double silicates. Method of manufacture of precipitated zinc oxide. C. Axroxorr. Brit. 459.233. Jan. 20, 1937 (June 5. 1935). Production of a caJdum aluminate suitable for the manufacture of sodium aluminate by treatment with aods lye. AsmstuXAm Noux Aivxcnvx Co. Brit. 457,576. Dec 16. 1936 (Aug. 30. 1934). oxidiriag ae i of SeOt an Genera! nature of tfe silicosis. H. Srxcarcxp. VerhanH. Dcut. at SeO* pt reference^.- Path. Ga,, pp. 262-71 (1934); Clm. Ahsn 29, 8169 d. Cxtiun ; 1935). [5] 299-30} residue efts rlidc add fa isolubQity d .uartxgroeaf ain-tixe free ion of hydr / Causation of pneumonoconlosea. Ptcur Dxixxxx. Joar. Ini. Syt- & TexiceL 18 (8] 524-36 (1936).--The vxriaos pncumonoconiosei and their causative agents are SEcosis and aabestosis are definite diseases; in snthnco*sGieosis and various silicatoses, modifications of normal lung conditions are seen. Sffeets of earben or carbonates, gypsum, and iron oxides are also discussed. hr. Resul t fairly gr .ed. all of tit Methods of estimating dust exposures of a workman indude the taking of dust samples from the work place and interpreting the results during the man's total period of The rate a rease ia grin E.J.V. exposure. Errors made from estimating the composition of dust from samples which have settled upon rafters in* nead of using samples taken from the air are emphasised. nussxx. t is.. 29, 71S Permissible dust concentrations need not exceed 50 million particles per eu. ft. for dust with very low quartz content 167 (1935). or 5 million for pure quartz. In defense of the use of Sde with standards of dustiness, the experience fa S. Africa where ompt. 3lent. dust standards have bees applied successfully for many which estab rears is cited. E.J.V. r- Se. asd C Charles If. Brady. Axon. Ball. Arner. Cenm. Sec* instants we BLB. l :=1 73-74 (1937). J Chemical considerations os some pneumoconioses (stkraeosis, silicosis): X, Watnre of the problem. Red iffecting pif TV'OILE. ltd ?AJxn. Ccnfr. Otim. Ini., J4tk Contras, Paris. 5 pp. fate solution ric anhydrii eial thaahtf too with-* with ortho" ectivdy, lA! ; i | *1934); Ctem. Abs* 29, 5774 (1935). y Clinical aspects* diagnosis, asd treatment of pseumo* ^eaaiosi*. W. Ixvxxc Claxx. Jour. Ini. Syt. 6* ~**icel* 18 (81 537-49 (1936).--Fneumonoconiosis is a ***ease resulting from the inhalation of inorganic dust. The two pneuraonoconioses which produce disability are f good hidW j *dicosis and asbestosis. The pathology of silicosis is char* asic titacnJ* acterixed by the presence of fibrotic nodules scattered eed nuclei. * ies or hidirf through both lungs, and that of asbestosis is characterized ^7 *o interstitial fibrosis involving the lower half of both ksgs. The symptoms of silicosis and asbestosis are simi* ompositi* ydride-wat *** the most important being dyspnea. The most com* **00 complication is pulmonary tuberculosis which, "m silicosis, is a frequent cause of death. The diagnosis of both silicosis asd asbestosis is made largely by a correla tion of history and symptoms with the X-ray examination. The treatment of pseumosoeesiosis is preventive asd symptomatic. The course of silicosis asd of asbestosis is slow but eventually leads to incapacity due ether to the disease itself or to a complication, frequently chronic pulmonary tuberculosis. The number of workers exposed to harmful mineral dusts fa mining and fa industry fa the U.5. has bees estimated as 500,000. E.J.V. Clinical hematological studies for the differential di agnosis of industrial silicosis. C. Sctioxsa ax F. A. N'oltx. Klin. fVoehschr., 14,9S7-92 (1935).--The authors have experimented with the pathological-anatomleal ac tions of the changes of the silicotic lungs in connection with the heart and the complete bloodstream. With the assistance of.electrocardiograms, they have bees able to investigate the condition of the lungs of silicotic patients. At the policlinic of Bonn University, Rftntgen observations of the last 190 silicosis patients were takes, asd these were analyzed according to pure radiological points of view. Various tables showing the bloodeeusts of several silicotic asd tubercular patients were compiled. After certain pe culiarities were established fa the blood stream of the silico sis patients, it was found necessary to make further inves tigations of the connections between the studies of the blood and the diaical RSatgenoIogical status. To obtain a most secure foundation, it was derided to separate those silicosis patients from the others who showed as important degree of tubercular complications. A characteristic blood status was shows fa nose dust patients. This shows dearly excessive increase of white blood corpuscles with increased sinking at approximate normal counts of red cor puscles and distinct small counts of lymphocytes at rela tive transitional forma of lemkocytes fa a streak prepara* ties. The same symptoms, eves if less impressive, are shows in a second group from the total of sycosis patients as positive cases with tuberculosis complications. W.F.F. Colored ceramic aggregate for decorative eoasete. J- M t. <r* S# * C TV. Puuvjx. //. ^rr. Cr*ajn. flot. jo (31 90-96 (1937). Diagnosis of silicosis. Extar R. Karecast. <4mct. Labor Lei- Rat.. 26,51-^5 (1530): abstracted in Jour. ini. Byf. fif TosieoL. 13 (S| 131-32 (1936).--Factors necessary to diagnose chronic st&cesis arc: (l) exposure to silica dust m mJdeat quantity for 3 to 30 years; (3) determination by intraperitoneal injection of the oodule-forating char* aettrof the dust: (3) nature of the work; (4) personal fac- tors sseh as south, breathing, previous respiratory dis- eases, etc.; (3) X-ray finding*. Serial pictures ibould be taken over a period of time. The location of the nodules is characteristic, avoiding the periphery, symmetrical discri- button, shape, and size. In this phase chronic silicosis is without disability. (6) Physical examination: no char* acteristic but some suggestive findings. (7) The pa* tient's complaints: these are negligible in the first and second stages, but later cough, dyspnea, pains in chest, eta. may occur. E.J.V. Economizers and air preheaters. V. Waucul EUe. Rew* K9 (30321 333 (1936).--IV. discusses the conditions which govern the design of economizers and air preheaters for use with boilers. . J.L.G. Epidemiological aspects of siCcesU and tuberculosis. Atiox S. Port axb Davto Zacxs. Amer.Rn.TubtreuU- tit, 32, 229*42 (1933): Cum. Ait* 29, 7334 (1933).--(a representative groups of both granite and foundry workers in Massachusetts, the frequency of silicosis and of silicosis and tuberculosis was correlated with the duration of ex posure to dtuts containing free silica and to the concentre* tiou of such dusts ia the occupational environment. Among granite workers silicosis was found in 15.2% and with tuberculosis in 7.6%. Tuberculosis is the cause of death in over one-third of all granite workers, a propor tionate mortality 3 times that ia foundry workers and 4 times that in all males of 20 years and over. Among the employees of 10 Mass, foundries, silicosis was found is 8.3% and with tuberculosis is 2.6%, a total frequency of eae*haif that in granite workers. The silicosis in foundry* men was sot only less frequent but also less advanced ia degree than in the granite workers. Pneumonia, causing one-fourth of all the deaths of foundryea. Is the greatest occupational hazard.ia the industry. Industrial health hazards and employer responsibility. W. J. McCarcmi. Trent. Amtr. Fovndrymen't Attn* 7 (If 161-63 (1936).--The importance of greater attention to the problem of overcoming industrial health hazards for foundry employees Is recognized. Medical aspects are --> foundry hazards are outlined, and suggestions for a control program are given. D. E. Cvaaraes. Ibid* pp. 166-79.--With the invention of the machine, dust became as industrial hazard. C. discusses the action of dust Is the lungs and points out that all dusts are not dangerous. Silica dust is one of the dangerous dusts but only when present in certain concentrations of certain par* tide sizes. The silicosis problem is complicated by the fact that in many eases there is also decided evidence of the presence of tuberculosis. In foundries many men with normal lungs work for years and do not contract silicosis although there may be evidence of fibrosis. C. explains the action of dust particles inbaied on previous pulmonary injuries and states that workmen who are disabled by oc cupational fibrosis contracted in the foundry general'* are those who exhibit evidence of concurrent pulmoai** infection or injury. It is the executive's respoasibiii:* to inform himself on dust hazards. conduct surveys of w., plant, and Inaugurate a program of control. Prospeetivj employees are grouped into three general groups: tho* which are fair risks and those which should not be employ are indicated. C. recommends that an educational pny gram similar to that used in "Safety First" campaigns v* inaugurated to combat the dust hazard. Dtaeussioc. Avar tt oL Ibid* pp. 130-90.--The various ways of prj. venting illness repointtdout,aadpteatttioaary measure taken ta the foundry are outlined. K.JL5. Industrial pulmonary disease due to inhalation of dust with special reference to si&easia. E. L. Mraoirrox : MUrcy Lectures, 1936. Lancet, pp. 1-9 (July 4): pp. *j_ 64 (July 11.1936); abstracted in /our. Ind. Byf- c* Ttsi. cal., IS [S( 139-30 (1936).--The first lecture is devoted tj silicosis, sj being the most important of the pneumonocs- nioses. Particular attention is directed to the occurres.*: of the disease according to occupation. During 1930 : 1934. at least 1321 deaths occurred is England and TVakj. of these. 373 were caused in the sandstone industry, an* 326 were ascribed to coal muting: the manufacture of pe:. tery claimed 270, metal grinding 142. gold miners. - turned from & Africa, 104. and tin misers 91. The discus is always originated by the dust of fine particles of Cm silica; the way is which this risk is present is a number ri industries is explained. Sandblasting the ture of abrasive soaps receive special note, as in both ti: hazard Is so intensive chat the onset of the disease is un usually quick and its course rapid: thus only 3 or 4 ycan of employment say have preceded the onset, instead z 13 to 20 years as in most other occupations. The ear- renee of cases in coal muting is unexpected, since coal itKi: is not a dangerous dust: apparently the disease is origi nated by dust arising from the rocks among which silica u found or from impurities in the eesL Out of ' 69 deathscr aQ coal fields ia Great Britain. H" a S. TValts. this undue proportion has uoc fined. Tis picture, both cUntcal and hi ts modifies when silica is mixed with othe rbencoali* associated ia the dust, the con s anthraco sis; here the fibrous tissue eat ustaadn* tains It ta help in blocking up tae lymphatics. In sis second lecture the influence of the dust of silicates, it of chemically combined silica, is considered. Of the** asbestosis stands out as most toxic: the particles consist " fragments of fibers, some 3 microns tong and l/ micron - diameter. They originate pulmonary fibrosis which * more generalized and less nodular than that of silicos*4 the condition develops quicker than silicosis, but the tts* deacy to succumb to superimposed tuberculosis is nocu pronounced. Other dusts considered are those of r-->* manite, day, talc. mica, and seriate; none of ti*-- approach asbestos and siSca in their dangerous qualities The harmful nature of any dust may be tested by notia the reactions which foQow when it has be*? either tnj'ecs*'- subcutaneously or administered by the tracheal rou-- suspended in Said: injection into the peritoneal ca'"7 may also be employed. The theory adopted is that dur- exert their harmful influence by reacting chestiexllyjri- 16; No;< Genera! fcse^ solmoce^ poatibHif T*r*et `twptoh, tps; th^ ^captom tioe&I pci npeignsb Xscssaim, aysef *. ymcaigri H.F.&. eo 0/ daa> XatL*mq 0; pp-34. T. cr TV devoted u tearuonccv occurreaa ag 1930 * asd Wafa; htstry, a tart of pot. mine*, tv The disea* da of fce 1 numbed e maaufsem both tb ease b sv 3 or 4 yean . instead d The ocearte coalites ase is oridhich silies a >9 deaths a S. Wales; azaed. Tin :cs modifies wbeu coals* asaathrso* dust and re tea. In tbr iScatts. u. . Of then ks consist d micros is b which i of silicosis bat the teasis b sot a we of *25* tone of thea ns qualitim ed bp nous* tier injected aehetl root* oocnl carit? is that duso mically with ts>ue of the lungs. the fife asd streeterr of which are tberv^T modified. Each form of dust stimulates a special fVgCti< of its own, while mixed dusu set sp mixed re^uon No evidence is put forward that dusts other than of silica or silicates are harmful, or that asp dust is of reducing the tiuir influence of any ocher. Iiirextigatioax os quarts and sorieite analysis of iaduadaatt. P. Samowct and E. W. JAttsn. Ardt. gjg. ft* BdUriai^ 115,133-51 (1935), abstracted in Jour. IfA, gey, ft Toxicol, IS (4J 54 (1936).--'The separation of vinous miners! constituents of dusts bp the use of liquids meins suitable specific {rarities b discussed. The stand* mg methods of mtneralofieal and chemical analysis of 4aso are mentioned, with t description of the X-ray ex* cassation. Some of the common minerals are shown. 'V'w b made of the mineralogy of sericit*. E.J.V. Methods of dust control. J. D. Lxrrcn. Tratu. Ante. Foundry*TM'* Ann^ 7 tl| 209-21 (1936).--The point to begin elimination of the dust hazard b at the <ouree. Methods used for controlling the dust hazards originating at different types of sources are described. L. $P**<*m the general methods used in dust-suppression problems and the estimation of the hazard, contending that the efficiency of a dust-coDeetioo system b best deter* mined bp dwt counts. Methods used for testing ven* libring equipment and the selection of fans are presented. Dun collecton and respirators, such as helmets, filter* type respirator*, and positive-pressure masks, are di* eased. Maintenance of equipment b necessary to the successful operation of such equipment and to the effi ciency of any (BstaSation. A dbeusmon b included. HXS. Molding of day after hearing at various temperatures. R. Mourns. Cottier* Ceram., IS, 221-23 (1934): Qifm. Zentr., 1934, S, 3296; Brit. Cum. Aht.-S, 54 (2TJ 591 *1935).--'Heating at 1U0 to 300* before molding increases the apparent porosity of the product fired at Pl<>* asd de* -tease* the resistance to breaking of a specimen dried at *. Homograph for ceramic talculariona. A. A. Ctrsctsal. knmpory, J {3} 374-76 (1935).--The nomograph facili* utes the chemical analyses and the calculation of the mount of oxides is the fired product and of the raw ma**ritd required for a given quantity of the latter. P.B. & E.S. Personnel management J.- E. Waltxxx. Factory Hanaiement ft Maintenance, 94 (12] S333--W (1936).-- The topics considered are (1) personnel management costs. *t selection employee,. (3) personnel maintenance. (41 Naming and education. (5) medical and health service. (6) 'fery and accident prevention, and (7) personnel service **rfc. Figures, tahles.and photographs ere included. J.L.G. Significance of free cryrtaffioe stttc* in the etiology of Ptosis and sHicotuberculosis. K. W. Jbrrtx ak H. **w**. Med. Writ,, 10, 345-30 (1936); abstracted "> Uue. M. Hji. ft Toxicol.. 18 [8] 130-31 (JWfi).--The author* duMi*d rabbits over a period of four years, first 2. :bcn 3. thru t* hr. daily, with porcelain dust having 30% Uca attl 1 to 2% seriate After this period the ani mals showed no typical silicosis although there could be seen sharp, pinpoint-sized, subptconl fod and a slight in* crease of fibrosis. During the dusting, tubercle badlli were administered intravenously. Them grew slowly, and with indurating processes, into a pulmonary tuberculosis while the controls showed no noteworthy disposition to contract tuberculosis. It b coodudcd that over a 3 to 4 year period of dusting with tuberde bacilli infected, it was possible to produce a tuberculosflicoab. although with the dust alone it was not possible to show szZicesb, in spite of the presence of scridie. By dusting with pure quartz (without tuberculoma injection and without seriate) for l hr. daily for 2 years, typical silicotic nodules were pro duced. E.J.V. Sfflczte eaaiysb in iadusuial duett. F. Saxtorsvs aNO E. W. JdrtSJt. Zentr. Gemerhtkyt. ft Unfalherkul^ 21,65-69 (1934).--Materials studied were from the Rhine Steel Works, the Thymes, and the U. S. Steel Co. Tables show Is detail the procedure and results, accompanied by ample comment and deseiption of methods involved. If dusty occupations are to be graded on a danger scale over loog or short periods, the tidrarts percentages and dust analyses must be carefully compared. These new re search methods ere concerned with the size of grains in dust raised and the accurate preparation of ssdissolved add particles, thus serving the combined purposes of mechanical phase analysis asd chemical analysis. Impor tant insight into the structure of different kinds of dust has been gained, and thb ha been increased by using definite purity tests. the xetnlin method. KJL Silicosis: harmful dusts which cause it W. R, Jokxs. Tmu. Ceram. Soc^ 34, 303-43 (1935); see Ceram. Air.. 14 (3] 84 (1935). Silicosis in the porcelain Industry from the standpoint of the physician. Senaryaxx?. Btr. DeuL Keram. Get., 17 f6j 322-30 (1936).--It b pointed out that a sili cotic lung rarely occurs by itself, being usually associated with tuberculosa. A description ot s silicotic lung is given. S. outlines the two theories of silicosis, mechanical and chemical, and dbcu*es the chemical aspect of the problem. E.J.V. Training your own instrument men. Alsus G. Moos. Instruments, 10 (1 ] 1^--18 (1937).--M. reviews basic con siderations. qualifications of candidates, training of instrument men. division of time between various types of repair jobs, supplementary educational work, progress re ports. and rating guide to be used in semiannual cheekup. R.W.R. BOOKS AWO Sl*U.rTl* Determination and Conttel of Indussial Dust. J. J. Biooxruiu a!ct> J. M. Dallavallx. C. S. Pui. Health Bull.. N* 1. 217, lti7pp. (Apr3.1933V.--Thb brief but com prehensive work presents ''the methods and instrument? used in conducting dust studies is industry, the interpre tation of results thus obtained, and their practical applica tion to industrial problems, especially those phases relating to control o( the dust hazard." Preliminary procedure involves the sanitary and occupational survey of a plant: final emphasis is placed on personal respiratory protection of wurker>. Between these occurs the dust technique. IG4 C&rttttU Ahstmstx v*i{. Hi. .Vo. tncnsjmfly large verdict*. The Workmen's Gmtpettsa* (sea Act fim applied only to accidental iajurie*. Occu pational rtiirun should be compensated under a& ir* rangemenc similar to workmen's eompeniaiioB but sepa rately, brnnn there is so much difference between them. Partial disability should be compensated. It is difficult to oVeic unbiased aad expert medical diagnosis of siEcoris and the degree of disability. There should be a special medical beard is each state for such a diagnosis, Preven tion is more important than compensation aad much cheaper. W.D.F. Mineral material* which produce gfllcoolg. B. Cou* m. Spnduaal.4# (411601-402; (421 dlH-lT (littn) -- Lung occurring in the porcelain industry are sot produced by. seriate or other minerals containing mica, as it is not present in the dust aad mica is not contained by the st&ceous materials used. This fact shows that lung ifimin are not connected with the presence of mica. The appearance of silicosis is chiefly due to the presence of free silica is the siliceous rocks used. M.V.G. Protection of health of glass and ceramic workers. T. TnoxAfl. GbuhiUU. 66 (491 fl**26 (1930).--*Measures to be taken in the ease of various Injuries sustained by workmen are discussed. M.V.C. and performance of stationary stsam boilers W. S. Pattwuoh. Cimbastio*, g (2| 23-30 (193H).--The absurdity of the terms "boiler bone power" aad "per cent of rating" as applied to modem steam generating units is (Sscuascd. aad mere rational expressions are suggested. The effect of variable catering gas temperature, operating pressure, aad superheat on the boiler performance Is an alyzed and illustrated by curves aad equations. Gas* temperature gradient aad draft loss through botlen are also discussed. K.E.S. - Report of the Committee on Ceramic Education for 1936. HuflLft E.Wctz. Bull. Amt. Ctram. See., 16 (3( 111-20 (1937).--This report includes tabular data compiled by E. E. Marbaker and E. H. Fritz. Suggestions* for starting aad maintaining a foundry apprenticeship system. J. E. Goss. Tran*. Ante. Foundrymtn's Atin-* 7 (2J 323-30 (1936).--O. outlines points to be into consideration la apprentice train ing. *"-* as methods of selection, testing prospects, age Ctniu. rates of pay. piece-work, requirements of a program, necessity of centralized- activities, trial apprenticeship periods, agreements, kind of instruction, related work, etc. A discussion is included. K.E.S. tirade has complete taformathm oMcefning the various chemical constants and characteristics ami properties *f most organic aad inorganic dements ami compound*, ta addition, various qualitative and quantitative tie* tenmnation procedures are given both fr organs and inorganic nihtraaces. LLCSkaw Rational Physical Laboratory Collectsd Researches: VcL ZZ7, 2933. H. If. Stationery Office. Loadoo. 432 pp. Price 13s. The volume contains twenty-three reports of researches devoted chiefly to the study of metallurgical problems. The reports cover studies of the various iron alloys, alloys of Au-Cu, Cd-Za. Ag-So. aad Ag-Kg, metallic cadmium, aad the crystal structure of- and J-maoganese. One paper is devoted to special refractories for mctallur* gical me anth. A brief resume is given of the properties aad methods of producing refractory crucibles, studies. aad tubes from silica, alumina, magnesia, thoria. alumina-day. aad silicon e*rbide<lay. M.CSkaw Official Year-Book of the Scientific and Learned Societies of Great Britain and Ireland; Reeord of Pub lications Issued during the Session 1935-1936. Com piled from Official Sources. 33rd annual issue. Charles Griffin and Co., Ltd.. London. 1936. vii 4- 170 pp. Price 10$ net. Voted in Xoiart. 139 (33>M*1 31 (1937). J.L.C. Third Ordinance Increasing Compensation of Oeeupe- , tioaai Diseases la Germany. JL Baczs. Reprint from RiiduarbtiisUaU, V6. 38. Part IV (1936). 47 pp. Berlin, . 1937. The new ordinance relating to occupational diseases la Germany went'into effectApril 1.1936, superseding the Second Ordinance of Feb. It, 1929. Several Industries ere added to ehe list of compensable diseases, including ail the ceramic industries (previously only the porcelain industry was insured), sandblasting, and operations toe cleaning castings and molds. Asbestosis In the asbestos trades and lung caacer in the chromium industries become compen sable. Severe silicosis, eompensabte under the Second Ordinance, is still the ooly form of silicosis insured against, but what constitutes the disease for clinical, rtntgeaolog- leal, aad judicial estimation is definitely specified, thus doing away with a hitherto vexatious miscellany of com plications. Severe silicosis accompanied by pulmonary tuberculosis requires only the establishment of the .severe silicosis In diagnosis. Among damage claims reported for occupational diseases since 1929, silicosis has stood at the peak; in 1934, of 1043 eases. 322 were for silicosis; ia 1935. of 1161 cases. 627 were for silicosis, with 140 deaths in 1935 from this cause. K.R. toots jlno seuxnas Bureau of Mines .activities in the field of building materials. D. M. Sa*ss. C*. Mints Information Circ.. Vo. 6924,31 pp. Free. B. collates all publications by members of the Bureau personnel on the subject of build ing materials and includes reports published by the Govern ment Printing Office aad mimeographed by the Bureau and articles in technical journals aad cooperative reports. R. A. Herat. Chemist's Year Book. Edited by E. Hoes. Sberratt & Hughes. Manchester; Chemical Publishing Co., Vew York. 1936. ISch ed. Price 56.00. 1257 pp. The hand- XSW jOtr&XAL Stank (Dust). Edited by C. LAuatzx?. VoL 1. Vo. 1. V April, 1930. Published quarterly by Wilhelm Kaapc- Halle. Price 5 Rm. The Association of German fa- dustrial Insurance Societies reports on the current statu* of the dust-control eorapaign aad surveys the literature- Two or three original research papers comprise the afit part of each issue, followed by reviews of pertinent liters* cure arranged systematically under (1) dust research *> properties, estimation, and measurement. (2) dust soun.*- (3) dust diseases, (4) other dust injuries". (5) prevent'^ methods, and (6) laws and decisions. 'KR- The American Ceramic Society February 15,1993 I hereby certify that the attached copies of Ceramic Abstracts, Volume 16,1937, are true and accurate copies, which are maintained in the normal course of business at the American Ceramic Society, 735 Ceramic Place, Westerville, Ohio 43081. Ceramic Information Center 735 Ceramic Place Westerville, Ohio 43081-8720 614*890*4700 TWX: 7101109409 %