Document 3730VqGNb1Mmd6evj9L5Qk3MO

FILE NAME: CERAMICS (CER) DATE: 1940 DOC#: CER019 DOCUMENT DESCRIPTION: Journal Article Abstracts - Fatalities from Silicosis and Asbestosis & Clinical Studies in Asbestosis 18 i r - CERAMIC ABSTRACTS od I (9) f':; no Compiled by r The American Ceramic Society Volume 19, 1940 I I. R o ss C P ltlds, Editer M ary J. G ib s E x a v C . V an S c n o ia c D orothy J. W allace } > A m uanis I C o m m u n i on P u b h c c t w n s J. D S u l l iv a n , C h c n m a n . E . E M a r g a t e * J B A ustin L A N . F lnn, R C P u iu n t1 ABSTR, .CTERS J D Austie A A Avert L R Barrett K. \V \\ B artlett A C Bevae D A Biddle A Biddulpb V J. B o u r n M Bruckner P I' Uudaikov J C Chattoo I- M . C bureb M Coho M. V Coodoidi P. S Dear F reak Fiabcr ^V. D F oeter J . L. C allup J D. G at R A. Grepor) Robert Halle Xlaji H a n ra b c im ; ; Haiti F C Heck R. A. K n a d l P C Herald M. B Hill C M H utl J F. Hyde Herbert Jailer C. B Irani * u. Z M tairb B E Kiokulkjo 'V D KJupmax Seiji K oedo Vm K ora Robert K uaie B B Laet W Loeweatbal F S M allette Y. S de M archi I. F M a r E H. McClelland J. M Soy J C Pbilbp E C Pierce Alexis P ibcvii M E Fooe K atherine Reed H. K . R ichard aoo R A Roaaebeck B C Rupreebt A B Searle i. P Shaaok u o llc S b a t t u t i d : rubhcchon Ojficc- ?205t2h5 tNndortNhoHrtihgahmSptrtoenet,StCreoelutsm, bEuass,toOnh,ioP i. C R Shelters H E. Stmpaoo A P Som F E Soaecsacbets A C Stcra B K. Strom M Take. L T bieu H to i Tburaaucr E J Vachuaka F. J Z \aaul W ;. V' * ;:. f \. Y, ` - U:! V '1 j ) 1940 General 79 y Ceramic laboratories; Georgia School of Technology* Anon. Ceram. Act, 34 [1| 12 (1939). Massachusetts In stitute o( Technology. />id.. [2] 44. New York State College ot Ceramics. Ibid. p. 45. Rutter* Unirtrii.ty. Ibid., (3] 78. University o( Illinois. but.. (1) 3 ~ *he laboratories are briefly described and illustrated. F.G.H. Ceramic schools. Current surrey of status and progT'U. AhoT Ceram. A t e. 33 16| 171-01 (1939).-A comprehensive survey oi ceramic schools throughout the country s riven. The course of instruction, the teaching sufl. the research staff, and the student body of each of the following schools are described: Georgia School of Technology. University of Illinois, Massachusetts Insti tute of Technology. Missouri School of Mines, New YorkState College of Ceramics. North Carolina State College. University of North Dakota, Ohio State University. Pennsylvania State College. Rutgers University, Virginia Polytechnic Institute, University of Washington. Univer sity of Oklahoma. West Virginia University, and Carnegie Institute of Technology. Illustrated. F.G.H. Contract law for engineers. L. T. Parter. Combuslion. 11 [2) 33-34 (1939).--P. explains implied and ex pressed contracts, as interpreted by the higher courts, with particular reference to the employment of engineers and personal services rendered by them. The liability of employers in such cases is illustrated by a number of court decisions, some of which are cited. H.E.S. Control of speed Is important factor in cement manu facture. Ano n . Concrete, Cement Mill Eel., 47, 238-39 (1939).--Early devices were friction driven. Later, vari able-speed motors were used. Now a vari-pitch speed changer is used which is operated by a small pilot motor and which is either automatically or remotely controlled. New power self-synchroniiing drives may be used to keep a kiln and the kiln feeder in synchronism. W.D.F. Development of central-heating system*. Lruct Ranh. Gcsundh.-Int., 60 (50) 753 (1937).--R. describes the de velopment of modern central-heating systems A new type of installation is explained, and various examples are calculated. W.D.K. Effect of condensate extraction on efficiency of the heat cycle. W. M. M e ije r . Combustion, 11 |2j 30-32 (1939) -- M. contends that the value of high superheat as a means of improving the efficiency of steam power plants is being overestimated and recommends the use of high initial steam pressures at moderate initial superheat combined with the mechanical extraction of condensate at appropriate stages of the expansion. H.E.S. Fatalities from silicosis and asbestosis; their incidence in industry. Anon. Iron o' Coal Trades Rev., 139 (37321 336 (1939).--The annual report of the Chief Inspector of Factories shows that from 1935 to 1938 inclusive, deaths from the two lung diseases in the refractories industries and in the manufacture of nottery have been approximate! constant, i.e., G8 in 1935, 50 in 1936, 83 in 1937, and 60 in 193S. Sandstone quarrying and dressing took 40 lives in 1935, 43 in 1036, 19 in 1937, and 27 in 1938. Preventive measures have aided in a generally small decrease: some of these measures are as follows: (1) use of alumina for flint in china bedding, (2) use of alumina for siliceous ma terial in parting powders, (3) use of nonsiliceous abrasives for sand or flint in blasting, (4) use of nonsiliceous material for kieselguhr in the slow cooling of steel, and (5) use of nonsiliceous material for silica brick for'lining steel and other furnaces. See "China-- Ceram. Abs.. 18 |2] 54 (1039). M.H. Gas heating Installrbon. H. D ietrich. Cesundk.-Inf., 60 (45) O/i (1037).--D. surveys the developments of gas besting after the World War and discusses the gas single heating system, the gas central-heating system, special gas tanks, tanks with built-in burners, rentability and gas prices, and the experimental capacity of a boiler on a low pressure steam-heating system and on a warm water beat ing system. Results of conducted experiments arc slated. W.D.K. Handling and disposing of recovered fly ash and dust. J X. DEUTSCH. Combustion, 11 (5)22-24 (1939) Three methods are reviewed, including the vacuum, the sump, and the introduction of the dust by means of s watercooled ram into a slsgging-bottom furnace near the level of the molten slag. The last method is discussed in detail H.E.S. Health damage by meant of industrial dust. Otto Schultz. Cosmaskt. 11, 57-GG (1039).--Pure coal dust is not dangerous; neither is silicon carbide nor corundum dust. Tin, copper, bronze, and aluminum dust make slight alterations in the lungs, and iron oxide makes stronger alterations, but none of these dusts affects the health. Of the dangerous dusts, free silica usually causes silicosis, which is the most widespread and dangerous disease, after only a 5- to 10-year exposure. Asbestos dust causes asbestosis by mechanical irritation. Lung cancer is caused by radioactive dust. The symptoms are like those of sili cosis. Chromate dust or mist causes nasal sores and also cancer. It has a long latent period, up to 24 years. Thomas slag causes a severe lung inflammation, as it reduces the resistance of the body to bacteria. This can occur im mediately after exposure and has a birh fatality Pyrolusite causes a different lung inflammation Glass woo! acts in a similar manner to asbestos. Over sensitiveness to flour, grain, hair, etc., causes asthma Certain fungi can grow in the lungs Methods of prevention are dis cussed generally. . ^ .D.F. Healthy air, a guide for plant upenntendenta ana workmen. Otto E lsnxr. Gesunik -In[ , 6 0 |44| 676 (1937) ._ A review issued by the German Society for Labor Protection gives the various kinds of air contamination and testing. Natural and artificial air-conditioning methods are discussed from the viewpoint of health, and a special chapter describes the airing of workshops, offices, etc. W.D.K. H ow benzol poiaoning may be avoided. A non. Cesundk- Int.. 60 (52) 795 (1937).--Forming benzol vapors must im mediately be caught by suction. A good supply of fresh air is necessary during the cold season, and the air should be replenished with prewarmed air. Benzol vapors are heavier than air and, for this reason, sink to the floor When installing a new air-ventilating system, therefore, suction openings should be located in the floor or near it Pieces treated with a benzol-containing solution should be dried in a well ventilating drier cupboard or special drying rooms. Benzol-containing vessels must be kept covered. . . ^ .D.K. Improved system ui the application of noncondenstng or extraction turbines. H. W C ross and E. S W ells. J r Combustion, 11 (1J 32-35 (1939).--Since electrical output is definite!, established by the energy drop between initial and exhaust conditions and by the quantity of steam flow, increasing the total steam pressure at the throttle for a given pressure increases the available energy and conse quently the electrical output. The application of a com bined desuperheater and feed-water heater at the ex haust is advantageous in realizing gains from the tfse of higher temperature steam. Examples demonstrating the possibilities inherent in such systems are illustrated and explained. H.E.S. Lighting for special industrial purposes. W. R. Stevens. Trans. IUum. Enf. Soc. (London), 3 (1) 3-16 (1938) .--S. describes installations requiring special lamp fittings for explosive and moisture-ridden atmospheres and the use of special sources of light, such as carbon dioxide discharge, daylight tubes, special daylight tunrsien fila ments, and high-voltage fluorescent tubes, for color match ing surfaces and special inspections. H JL.R. Llving and working; conditions in the tnstat* mining district. E van Just. M inint Conir. Jour., 25 (111 (1939) .--Dust in the mines is kept within safe limits by wetting down, spraying, and ventilation. Above ground, dust from "chat piles" is practically nonexistent as they re coarse material. On windy days dust is blown from s few At accumulations of n od. Road dust, however, ac- Cenemi 81 1040 , , 515 water h a r d n e s' has been develop ed by l h ^ . <^ cTM 2n Soc.cn for Chemical Apparatus ,,.iY. t r. Surface heat lo itet from outa.de f w c . 4 ^ 0 9 3 9 ) - m-TKT Heal Trealixt & F o rfini. 25 |9] 4W (J Alum mum p a n t r e d u c / s h e ^ l c s s from furnace wa.ls and the sue and shape of the body There is an optimum temperature at which drying is most readily carried out. the smooth nature of the relationships oetween greatest safe rate of drying and the dimensions of the test pieces suggests that an ultimate understanding of the phenome non of cracking will be achieved. See Ceram A t , . 19 |1] 16 !>W0) b b BOOKS AND SEPARATE PUBLICATIONS * c T M Standards, 1939. A merican Sooety r or TestiJ c Matem^ s, Philadelphia. Pa. Pnce to nom members WOO one part. 115.00 twoparM parts --The book is in three parts. J, M etals. Feirous " t - . . i . i . ara discussedi methods of chemical a n a v " s.reT o t^ n S t i n * methods are pre sen ed U. NonSetalUc m ateriale-eonetnictional. This Dart includes cementitious materials, concrete and rates masonry building units, ceramics, refractories. pyr ind i i u T e ^ a l insulating materials. Umber pre^nra- u ves paints, varnishes, and lacquers, road waterproofing and roofing materials, and soils r ! general tesUn* methods and thermometers are described. HI. Non- meuSuc0 materials--general. Fuels, petroleum products electrical insulating materials, rubber textiles. s<ps au d e te r re n ts paper, plastics, and water are covered. Gcn - S S m l h o d . are given. Available (rom Amer. Soc Testing Materials, 260 S B road St., Phtladelphia.^Pa. Finding List for United SUtes Patent Design, J/* * * Mark, Reissue, Label, Print, and Plant P, , *n.t w ?s m e . s - ' w e x t * X i ( 1939) -- M eth o d s have been developed for a s s t m g weathering characteristics of d a y Products fired under various conditions W o rk on d a y roofing Ule h t i b e . n contmued. Investigations on refractory materials include (1) the pressing process an d its relation to the t e n u r e d a y silica, and sillimanite brick; (-) the drying clayware; and (3) the firing operation. A careful s t u d ^ of (he smoke emission from various interm ittent k ^ s firing blue and brindled heavy d a y products has been made, and suggestions are advanced for its reduction and con trol Laboratory work aiming a t relating the condition, A theory of the mechanism of the flow of water through plastic clay during drying has been developed, in which the force causing the flow is regarded as a repulsion between the clay particles which are separated m all directions by water films. A measure of this repulsion is obtained from the moisture contents assumed by the clay when various nressures are applied through porous pistons into which the water is allowed to escape. This pressure is an ex ponential function of the moisture content as is also the "aaueous conductivity" or the rate of flow of water through unit volume of the day under unit pressure. On this basis the distribution of moisture content at any time through out a drying shape can be theoretically calculated, the analysis being analogous to that of heat diffusion A strict solution is not possible, but experiments on a num ber of days show a means of approximation which permits the calculation of moisture-content distribution m bars drying from one end only. The experimental verification of the theoretical results confirms the hypothesis Many years' study of electrical insulation and he ma terials used therefor has greatly improved the reliability and the advantageous selection, preparation, and use of insulating materials Better insulators have been de veloped. thus reducing the sue and eventually the cost of electrical apparatus of all kinds without loss of quality The suitability of certain glasses for use in the manufac ture of telephone insulators is shown The degyee of homogeneity in optical glass is almost completely de termined by the temperature conditions prevailing during the annealing process An investigation has been made ol the maximum temperature gradients in an annealing oven consonant with the production of substantially homogene ous optical glass. The cooling schedules of the annealing process were experimented with lo determine the minimum period ol annealing for glass of high optical quality. Methods of producing light etch marks on glass nave been developed, and an optical system to enable the degree of polish of a glass surface to be assessed has been devised Thepreparation of filing materials for etched lines required to be unaffected under specified conditions, is desorbed. A.B.b. of atm o sp h e re a n d t e m p e r a tu re with t h e bl" ed` Silicoiia and Aibestoail. Edited by A J Lania y firing d a y s h as also been u n d e r t a k e n a n d h a s p ro g re sse d Oxford U n iv e rsity P r e s s JCew Y o rk 1938 r 3 9 pp_ satisfactorily. . . D rying cracks are due to differences in moisture con tent established in different pans of the d a y body, espe cially between the surface and the interior. Differential shrinkage thus occurs as drying proceeds, and if * produced. The direct method of studying the problem consists in determining the fastest rate at which particular sha pes of a given d a y can be dried with safety, and t_e variation of t h a t r a te with such factors as the temperature Price 1-1 25 Reviewed in Mech. E*i . 61 [5| 405 (1939) The medical and public-health aspecti of these industrial dust diseases are comprehensively presented in this bewk. to which several physicians have contributed The history of the diseases, their symptoms and diagnosis, their pathology, and their prevalence in various occupations are discussed, as well as methods of prevention a n d control Each section has a bibliography r G H. \'o. 6 c raw Many Unes ap of is in* D. j-pcil R G W E 3483. and pciro. H >rre !/. 5 re*.-- ;anjra- .ie ore ie ore white 3 tall ir o re s * H >S AXD. 9 -- In ate of ate to up to :t :i is 3 aad. larger which above. :imen- - and t rates Pan is 'C p v e 3 5 r9ed m eraJ is V C TxJuet. - . 44, ' o o ru * .'.aunje ,o\ide, drox\ G : mi\ g 1939) sc rule 3 H No 7. >cd o r. .3d be Feel of . : c; t ) JJCl oi an ^curro Chemistry and Physics-- General 149 1940 .-oTiposiuor. and properties ol the ' i d and h q u ' ^ , P 1g4 t , ' , " p i t l e n b o n > an d t r e a t m e n t of lead poiaotuag I m e H eller O n TM H tu ln p . 83, 639-41 U 9 3 U ). Chcm AOs 33 8329 (1939) -- In H u n g a r ia n P b works. Pb potsonini recurs m 100 to 200 of 10.000 laborers annually Le cumulated within the hum an organism can be mobihxed h modiivme the C a/ P balance cautiously This was dont in c U ^ r i x U n m e n t . by a d , c poor ,n Ca an d 8 to HI gm \ a phosphate given each second day for 3 to 4 *8* \ n y Pscondary effects of p h o sp h a te can be balanced b y the admin istration of th iosu lfate from time to time. StlPctc acid gel*: IX. C harles B H ^ r s p H ^ R , tv P aton. jo u r. Phys. Chew., 44, 5 i - W UVWU i n J effect of a cfaanjc of p H on th e tim e of set of cels produced by mixing solutions of sod mm sihca.e and scene acid discussed For P a r t V see Ceram. Abs.. 15 131 108 U 9 J b ) Theory of Ught scattering. S P arthabarathy Phil Mat 29 11931 148-53 U P 4 U ) -- p shows th at the scatter- o(' l l l h , observed by K r i s h n a n in binar y liquid m ixtures " Molecular ' Ceram, A i r . 17 13] 119 (1938)) is purely molecular, while no sc atterin g arises from cluste" m`f *n ^ at the CTittca' solution t e m p e r a t u r e N o new theories as. c'g those of Frenkel, C ans, or Muller, appear to be_neces- sary to explain Krishnan's results K n Science Front, 1939. F Sherwood T aylor Cassell X: Co Ltd , London P n c e 7s 6d Reviewed in Times Lit Supp. 39 [1984] 79 ( 1 9 4 0 ) - T describes recent developments tn science, including theoretical researches and techmcal inventions Illustrated K. V' W B PATENTS Cadmium-red manufacture. W alter F M eister i In terchemical Corp ) C a n 38 .430. M a rch 1_. 1940 (June IS, 1937. in V S Ju ly 9. 1936) G M H Enam el * a n d glaze* a n d m e t h o d of producing. C arl O berlandEr and F. H Z schacjce (Sioio G.m b H ) V. S 2.194.246. M a rc h 19. 1940 (M ay 20. 1 9 3 6 ) -- A preparation for improving enamels, glazes, etc . comprises a magnes ium borostlicate h av in g substantially the i'ollow - mg composition- silicic acid 30 to 50. boric acid 10 to 30. magnesium ox.de 15 to 35. ar.d alkali com pounds 10 to -pc " M a g n esiu m Otanates a n d m eth o d of making. J A P luykett and E ugen e TVa in er ( T ita n iu m Alloy Mfg C o ) U 5 2.190,325. April 9, 194') (M arch 5. 1<>3S! _A calcined synt het i c ma g n e s i a - ma n i a composmor. cor. taming chiefly finely divided magnesium m a n aie chemi cally com bined wiih 3 to 12% ol Silica a n d alum ina, the ratio of silica to alu m in a ranging from 8 1 to 12 1 o! particle size su b s tan tially all w uhin the range of 0 5 to 2 microns, an d hav ing a refractive index of ab o u t 2 15 Pro duc tio n of bery llium com pounds. C arlo A dawoli ( P c r o s a C o r p ) l ' S 2.190.048. April 2. ly4U ( M a rch 2 j 1P3 7 , -- a process for the pro d u ctio n of beryllium oxide from minerals containing beryllium and for the cyclic re co very of the reacting ag en t em ployed consists in p o w d e r ing the beryllium-bearing ore, mixing the powder with an alkali btfiuoride in an a m o u n t corre spon ding to 2 mols of bifluonde for every BcO molecule present tn the ore. a d d ing water to form a paste, compressing the paste to briquettes, healing the briquettes to a temperature be tween 550* and 800*C. to cause the fluorine to combine with the beryllium to form a double alkali fiuonde. leach ing the reaction product with pure water at a tem perature of a b o u t 90* to ltXJ' C , adding alkali hydroxide to the alkali beryllium solution to precipitate beryllium as beryllium hydrate and form neutral alkali fluonde. sepa rating the neutral alkali fluonde. calcining the beryllium hydrate to beryllium oxide, and treating the neutral alkali fluonde with a strong acid other than hydrofluoric to con vert the neutral alkali fluonde to the corresponding acid fluoride P u re ti t a n i u m dioxide. V.' TV P l e c h n e r a-nd A V* H ixson ( N a tio n a l Lead Co ) Can 386,985. Feb 2'J. 1940 I Oct 12. 1937) G M H P u re tita n ium ozide. TV TV P lechner and A V. H ixson ( N a tio n a l Lead Co ) Can 386.G25. Ja n 3D. 1940 {M arch 7, 1938) G M H T ita n iu m pigmeDt m t n u f a c t u r e . R obert V. Anc ru n and Assur G O ppecaard (National Lead C o ) Can 3SO.623. J a n 30, 1P40 ( N o v 29. 1937) GM H Zirco nium oznde t n d m e t h o d of m a k in g C J R inzie and D S H ake ( T ita n iu m Alloy M fg Co L' S 2 194 - 426. M a rch 19. 1940 (Ju ly 28. 1 9 3 7 ) -- A crystalline zir conium oxide o b tain ed by th e calcination of a zirconium- oxygen -carbon co m p o u n d w ith o u t su b stan tial grinding of the calcined product characterized as an essentially white powder and as being essentially white in color and consist ing of crystal particles having their leng-h greater than their width and their thickness less than their width, an index of refraction of ab o u t 2 3 to 2 4. and an adsorbed colorless carbon content of about a stoichiometric eq u iv a lent of 1 6 4 % carbon dioxide Generi! Absorption of t e i d a n d arse n ic through skin. A non Jour A m rr M e i A ssn . Queries 6* Minor .Sous. 114, 604 Feb 17, 1940) -- Lead a n d arsenic absorp tion th: DUfh the -km - ues not occur to an appreciable extent in contact with aqueous solutions of these co m p o u n d s in co ncentrations be- loiv 0 5 m gm . per 100 cc of solution It is unlikely t h a t sig n-meant q u an tities could be ingested because of c o n ta m i nated hands F s; 1 / Clinical *tudie* in a*bcto*i*. M J S tone Amrr y Rr. Tuberc , 41, 12-21 (J n , 1940) --This report ts based upon exam ination of ISO per so ns formerly em ployed in the opening, carding, spinning, a n d weaving d e p a r tm e n ts of an asbestos brake lining p la n t. F S.M Compensation for mdutrial injurrei *nd occ-pthonal disease*. E R K ooytz Jour. A m rr Med Assn . 114. cxxl-69 (Feb 17. 1940) -- K riv e s *n excellent discussion of a few of the m a n y legal a n d medicolegal phas es of compensalion laws of p n m c im p o rtan c e to physicians interested in the field of m d u s t n a l medicine. T ables show the c o m pensability of occupational diseases, limitations of time and cost of medical and hospital benefits in compensable injuries and diseases, and the determination of medical m atters under com pensation law s, all d a ta arc given by nates FS.M Co nsider the t u d ie n c e . S M arion T lcseer A S T M Bull . No 103. pp 27-29 ( M a rc h . 1940) -- T stresses the im portance of presenting papers effectively The causes of com plaints are considered T h e p rep aratio n of a technical paper is taken up with regard to the contetu m d stvle The m anner of p resentation is also consic-.red The audience must be considered first in technical paper presentation ^ ^ Dust-control *y*tem* for the me til-fizz, thing indu try. R ichard T P ace Melal C leanm t - F u n sh in t. 10 [SI 30--g7 (1938) -- D u st is undes irable in a n y i n d u str y M an y of the metal-finishing processes, e.g., sandblasting, grinding, buffing, polishing, etc . are outstanding dust producers Control procedures discussed are (1) personal respiratory protection. (2) su b s titu tio n of a less harmful material causing the dust, (3) wet methods. (4) complete enclosure of th e d u s ty process. (5) segregation of p a r t of the equipment, (6) improved ventilation, (/) partial en closure under negative pressure, and (8) local exhaust ventilation A detailed s tu d y of dust-collection systems is presented. Air m otion is discussed, and a table of air speeds in ducts necessary to convey various materials is given A table shows the m inim um thickness of metal for straight exhaust piping Fans and cleaning apparatus i i l I 1 ti i ' X * i r) lrI! lj m i r a i 205 -- . a' " ~ ;,ar 1 ; e m. - a ; wor k fr. f Ce p a r t m e n ' ' >Z~ 7 P" d f' r r ( / T ^ . r 'c m u m a l o g i c a ! e x a m i n a t i o n s b> . - - <-"A ': a r.d r 1h c ' pr ocesses u se d :r. de ' r - Tuni ng roc .s - - -. s a - . c o r c r r, t r a 1c i of all l y p c i It is ire - o.; f r c ~ ,v ' t i u / i o ^ U ' n r i t c - o ^ r opi ni Gro ' - - . cmme r e . a. s a k e ci a mineral product or to five . - , , f c r. ~ c ' r.ods of p r e p a r a ' on for t he ma r k e t C h e m i - a nC r . r c r . ant c a l a nal ys e s c a n aJso be made oi soils ' K R f atal sub acute occupational lead poiaorung. W er-NER ; k harot A r c * ! G c L r r b e p a l h & (7 rv n b c h y i , 9 , 4 0 7 -1 3 j <-) -- i n d u s t r i a l lead poisoning as a rule is a chronic pn-sorung Characienstic sy m p to m s appearing suddenly. the co:ic and intestinal stoppage, show t h a t t he p-'von has been at work in t he s ystem (or a long t i n e poisoning as an i n d u s t r u J disease is s el dom en- rj -'e 'e O L reports an acute case which came to the Cl.me for I n d u s t n a l Diseases and discusses its r i r V e v a t i o r . t On Dec 4 , 1938, a sprayer of lead 49 ears old. a s b r o u g h t t o t h e clinic in a d a n g e r o u s l y ill rendition Very carefully a nd fully he was e xa mi ne d. r e v . dav he di ed For s eve r a l -ee_ks as an oc-caxictul w * e r Or 'rad beer, s p r a y i n g c abl e muffles m a cabl e - i - 'The work space wa s 3 i 4 i 3 m , t he s p r a y i n g wa s ' - p e c t r : tc Or done u n d e r a Looc T h e w o r k e r u s e d a <P>i % pis'C'l :r, whi ch a lead wire a s i ns er t e d a n d t he -- c i r r gas h a v e mixed with air, which was introduced - : he pistol at t he s a me t i me me l t e d t he l ead wore ~ ' -. al t er , lead wa s at once e j e c t e d b v t he pr e s sur e of t he . ' sprayi ng t he muffles r e v o l t i n g ir fr ont of it D u r i n g -us process t he wo r k e r wa s e x p e c t e d t o w e a r a m a s k a n d manipulate the pistol through slits About the middle ' November he had been seized with violent pain and o r t i ng. he was off f r om w o r k for S d a y s a n d r e s u m e d u-crk again late in N o v em be r The hood a p p ar a t u s was nrn out of r e p a i r , t hr e e o t h e r m e n w o r k i n g in his a os e nc e - -ne same small space, with very low suction in the w u a t i C g apparatus, caused the returned worker to ask " " the night shift where he could be alone On N o v em be r ' v-r was o v e r c o me wi t h t he s a m e vi ol e nt s y m p t o m s as 'e'ere Be. ng s o m e w h a t b e t t e r b y t h e ne xt n i g h t , he w e d or, wor ki ng, onl y t o r e t u r n h o m e in t h e s a me c o r . "ic:. w , t h. a d d i t i o n a l s y m p t o m s his wife n o t e d t h a t ' < face wa< ax bl a c k as lead E de t a i l s t h e m a n ' s f u r . h e r ' " a > d c wr . and t h e efforts o' t he c o m p a n y p h y s i c i a n m :a -aijcn these faihng. the victim was t ra ns fe rre d on 2 *c - t o the O c c u p a t i o n a l Cl i ni c T h e p l a n t c o n d i t i o n , _rdci which the lead spraying took place were examtred a-c reported on by E after ' he autop sy A large hole a f ound m t he left side of t h e f r a m e w o r k s u p p o r t i n g he hood t h r o u g h whi c h t h e s p r a v e d l ead h a d b e e n t s c a p - "g into the small enclosure lead dust lay he avy on the S.ass val ves of a ppl i ances c a r r y i n g t h e cabl es he c l o t h m g and snoe* worn by the t'anou shifts w c ' 'd nr -odder wi t h t he s c a t t e r i n g l ead d u s t , t he - o: t - 0' ( r w as ;n di srepai r so t h a t be mi g h t not h a v e orr, it v , h 's final night shifts He must ha ve b r e at h e d t h e lead dv : ns mos t finely d i v i d e d p a r t i c l e s , i e , in aJrc*>5t 'olecuiar form Such a n aerocolloid condition is ta ke n op bs ' h e or g a m s m n t h speci al t a *e a n d c o n s t i t u t e s t he " * Kes' possible risk to t he s u b j e c t T h e l u n g s in t hi s ot s c were p e r m e a t e d wi t h it. a n d t h e b l ood r e a d i l y e a r n e d wn faia! dux? to t he e nt i r e v s t e m F r o m t he e x n d e r c c Cr-iNcd fr om the illness, t h e a u t o p s y , a n d t h e p l a n t , F excludes that the poisoning could be called acut e but also 'hacutc the worker evider.th havi ng been v m s i l u e d b> f.-*: a 't tc k and the subsequent exposures, massive ;n i ' a c t e r . s u s t a i n e d D e c e m b e r 1 a n d 2 An i n s p e c t o r v r'rd *ha B' ' cr being p k e t d on t he ought sh.il, this m k c r f ,* c dene t h e wo - k o' t v.-ee o r d i n a r y m e n on t he v ^ a y v.z Hcncc h s constitutional resistance was u tte rly c ; ' v - .rv ; e r d r r p r / T h e . t a d c o n ' ent of t he u ..it v T. *< -- 1 ' pm c d"' 'cor* 4^'- s- \r ^ 0' the . c, r d T7 ' -> in 1h g m t ' t h e k i n e v s K R F . f g*j. g e n e r a t e - H a i p C y i r ' is F i v '' . - 1 y ' I ' xs " ' * r A - ; A * e - 3 T ; ' - h i . v S -- D c v e ' c ; - e - s ir, i r e u x, c ! e ,e c ' r ,c a e r t ' as a ->u - ce o 1 heat fc r ' b e c a r b e n i i a ; c n c ' coa 1 a ' c Crscnoeo Illustrated : GH G i a n i n d u s t r y of O h i o \ r t h i .ti S 'vnatts Cmic Skc.v i v n f Espi Sic A e v i 11 ' 41 T>~ 13 N19 3 9 1 -- O hio is the t h ir d la rg e st glass p - o d u c i n g s t a t e a n d t a x '. w e n t ) glass p l a n t s Ir. 179~ t h e r e w u a giaLss p la n t or, the Ohio river, by 1825 they were all over the state The p r o d u c tio n of hollow gla ssw a re h a s in c re a se d tw e n ty limes since glass blowing m achinery has been introduced O h io is an i m p o r t a n t p r o d u c e r of flat glass T o c a y th is is draw n from the ta n k as a co n tin u o u s flat sheet O ther im p o rta n t p roducts arc electric light bulbs, fiber glass, and glass blocks for use m budding construction 'A' D F Plant laboratory. K Spinole* T o m n d - Z t t . t2 [44] 492-93 (1938) -- T h e p la n t lab o ra to ry has the follow, mg task s the tts im g of raw m aterials and ba.f-finished a n d finished p ro d u c ts , the w o rk in g o u t of new fo rm u las i m p r o v e m e n t of old s h a p e s a n d c o n s t r u c t i o n of new s h a p e s and local research W K P r e v e n t i o n of m d u r t n a J d e rm a titi . J V T j- aude*. E R G r o s s , ak d H B r o "N Arc* f r w s : 5 , f r ' S y p * - ilol , 41, 331 ( F e b , 1940) -- M u c h of th e m d u ' t r u i l s ic e disea.se is caused by the m e t h o d s of cle anin g the skur Sk-r, c .ta n k in g , m e t h o d s a n d m a t e r i a l s used a n d th e use c.' protecuive appbcatiotis are stuebed Form ulas for ejgbt protective applications are given Substitutes for me charuc abrasive soap are listed V arious kinds of soaps and detergents, such as tn e tb a c c .amine soap, napbuneruc acid soap, a n d sulfonated oils, are discussed The detergent pro p erties of the vegetable meals are not sufficiently a p p r e ciated FSM . PyTopbyllite durt; iti effect and control M F T bice Arrer m l .'.fining Afe,' n g v Tfch P u b . N o 1179 A fim n g Tech . 4 [3 j 13 p p (194C) -- N o r t h C a r o . m a is the only com m ercial source of p y ro p h y ih te at present Pyro- phyllite occurs associated with quartz, together with c h l o n t o i d a n d serici te All t h e pvTO pbyll ne m a r k e t e d is g r o u n d , it is classified b y air s e p a r a t i o n It is m i n e d - b ' o p e n -c u t, glory-hole, a n d u n d e r g r o u n d m e th o d s A: onJy o r e o p e r a t i o n h a s w o rk beer, e a r n e d on s nee I Q20 D r . d e r p o u r . d th e free silica c o n t e n t of th e d u s t is 3 5 c"c S~Fc of the p a n ic le s are less t h a n 3 m ic ro n s in s iz e . dust concentration rises to NX m ilLor panicles per cu ft b e " d ril.m g X -ra y e x a m in a ti o n was m a d e of IC. workers ci those with over two year* exposure, 3592 * t ' r affected tw o died Tfce lesion* were th e sam e as th ovr p r o d u c e d b> free silica alo ne T h r t h r e s h o l d d u s t c o n c e n t r a t i o n a llo w a b le u n d e r g r o u n d is 10 million p a n ic le s per cu ft D n U in g is d o n e w e t, stope* are v e n t i l a t e d by ` s e n t u b e s Above ground, tight housing for m achinery and exhaust ventilation have been installed These p rocedures give the required results R e c e n t C o m x ru tu o n ffndung-. * vov DF ^ CAic Induilricl _ rnrinsitcn Somlcrr, 13, 4 i --l-- ( M a r c h 1940'' A r e m p l o y e e of a steel fo u n d r y w o r k e d fr om M a y 1922, *c June, 1939. in the cleaning d e p a rtm e n t in the foundry where his duties required him to remove hardened sand from castings bv use of a p n e u m a tic h a m m e r A dust count in the room showed a n exposure well t-clow the accepted safe standard, but the dust contained approxi m a te ly 2 0 % of free silica T h e C laim s Referee w as cf the opinion th a t the exposure to silica dust was well e s ta b lished. and the claim was approved as compensable by the Silicosis Referee* Acting under the proxisioas of an am endm ent to the Occupational Disease Act effective M a y 26. 1939, the C om m ission f r a n te d an aw ard of 1650C to the widow and minor children. pa>abie at the maximum rate of SIS 75 per w k ( ^ M R e c e n t d e v e l o p m e n t in r e l i t o n to a d i t o ' _ e c . V G a rd v er !nd Med . 9, 4N-5 (F e b . m O ] - - C e r t a i n t e n t a t i v e co n clu sio n s d e r i v e d fr o m e t p i n r r . e e a! work upon Silicosis in p^ogres: at the S aranac L a b o ra to ry i s o m e \ e a r < a*e re c o rd e d A.s a basic d o c tr in e . G cor xide'x t h a . i* ,* v h tr u e tr .a t onN ' cer ta-r. fewms of `rcc x ';:-2 a - r ' he f ' cr- 7 k r r v n as a sbe s' os f d r ov r. . .ca t e ' / r r k lb'V. * `i J .' ! . < l -- iI 'A > ' ' i4 1 I' ' i I >- * , 4 : i - v * 206 Ceramic Abstrais Vnl. 10. No. -j are capable of producing fibrosis m a normal lung The composition of a bodv inav be modified to oh! un s dcxired trend oi wme of the Saranac experiments, however. has thermal expansion The thermal history al-i arfectx ihc altered certain concepts previously regarded among re thermal expansion; certain compositions tired it luw lem search workers as fixed. Inhaled chrysottle asbestos peraturcs have less expansion than the same liody nrert nbers oow appear to be irritating, not because they are at higher temperatures Thermal expansion mav be silicates, but because they are stiff libers, mechanically measured directly on a bar or by the interferometric irritating to the lungs. Grinding them down very linely method Godies with a considerable amount of high so that few of the ribers were longer than 2 microns prac expansion quartz in low-expansion clay may *liow tlunttng tically destroyed this irritating property. Even with an tendencies on cooling. Beta-quartz expands un cooling average atmospheric concentration of 125 million particles and may also set up strains. The abrupt quartz inversion per cu. ft. of air. no fibrosis developed. If the effect of point at 375*C. may be destructive. Quartz and c la y s asbestos on the lung were entirely chemical, a decrease in have fairly uniform thermal expansions, but the feldspars particle size might be expected to increase tissue response. are variable. Hotel china, sanitary ware, and rtoor tile Large particles of free silica have little effect on the body, all have thermal expansion curves lying cloc together. but smalt particles increase the reaction of body cells. The quartz present does not seem to affect them. A The histology of early asbestosis. as detailed by G., does quartz grain shrinks more rapidly on cooling, and it is not suggest chemical injury. Among dozens of different thought to pull away from the remainder, so that it docs silicate minerals, only the group of five known as asbestos not fill its recess in the body completely on cooling. are unique in having fibrous structure and in being com , IV.DF monly recognized as pulmonary irritants. The group Report of Committee onCeramic Education. N W varies in chemical composition within itself more markedly Taylor, Chairman. Butt. Amer. Ceram. Sue, 19 16' than, as a group, from other silicates. Chrysotile asbestos 220- 21 (1940). has the same chemical formula as a nonfibrous silicate, Report of Committee on Publicztions. J ohn D S ll li- serpentine, which is physiologically inert. In mills that v a N. Chairman Butt A m er Ceram Soc . 19 1n1 222-'J fabricate asbestos textiles there may be much fine dust, (1940). ' ' but if the dust is composed of serpentine and very short Report of Committee on Research. A n n u a A W ells chrysotile fibers, clinical asbestosis will not develop Chairman. Bull. A m er Ceram S o c . 19 |u| 2I4-1S Free silica dusts, unlike those from asbestos, cause a chem (1940). ical form of irritation in laboratory animals. G describes Report of Committee on Sections and Divisions. M Z the two histological stages which characterize the tissue H olmes, Chairman Bull. Amer. Ceram Soc 19 [nj reaction in such animals after inhaling excessive quantities 221- 22 (1940) of pure quartz or flint dusts in an extremely fine state, Report of Committee on Standards. J ohn W Wnn-rt- tn human subjects, only cases of rapidly developing MORE, Chairman Butt. A m er Ceram Soe , 19 !ol 21S-20 silicosis show evidence of this two-stage reaction The (1940) solubility hypothesis, however, hitherto rather widely Roentgenologic aspects of bronchomjcosis. H. P used in interpreting silica reactions in the lungs, is de Dou*. Radioloiy, 34, 267-75 (March. 1940) --The signs , clared to rest entirely on indirect evidence. It has never and symptoms of the bronchomycoses are similar to those been possible to prove that silica dissolved within the body, of tuberculosis and they are often at first thought to be because the soluble material immediately combines with tuberculous in origin. D. describes some of the more i local tissue elements. Soluble silica detected in the prominent Roentgen signs of the various bronchomycoses , urine and the blood is now generally accepted as more .. . FS.M I likely derived from food and drink than from inhaled Silicosi*. E R. Hayhl-rst Merck Rept , 49, 6, S. 9. : dust. G. describes many of the Saranac expenments 28, 30. 32 (April, 1940) --H gives an excellent short review whose outcome individually and collectively is difficult of silicosis. F S M i to reconcile with the theory of silica solubility No fibrosis has ever been produced by single or repeated in book j jection^ of soluble silica in its various forms. Evidences Engineers and Engineering in the Renaissance. W il- : of specific toxicity exerted by silica upon living tissues have liam Barclay Parsons Williams Sc Wilkins Co . Balti been manifested through long series of experiments last more. 6fll pp. Price 48. Reviewed in Science ,Vrt.-i ing years; many concrete examples are given. Intrave Letter, 37 (12| 192 (1940).--P. discusses the amazing engi nous experiments immediately fatal to guinea pigs produced neering achievements produced during the Renaissance. no symptoms in dogs. The toxic effects of quartz have P.G.H. been more or less neutralized by adding small amounts of Afferent substances, e.g., colloidal aluminum hydroxide RATE NT which gives complete protection in a 0.03% dilution. Coating and coloration of granulated materials. P Particle size is discussed as having new and unexpected HARSimgROtR (Bakelite Building Products Co , Inc ) I relations with both highly toxic and merely slow fibrotic U. S. 2,202,002, May 28. 1940 (June 2. 1936).--A roofing conditions. G. is cautious about drawing final conclusions granule has on the exterior thereof a coating comprising z from animal experiments alone, but he does begin to cor hardened bigh-alutnina cement containing principally relate his experimentally derived facts into a coherent calcium aluminates or calcium alumina femtes and sub silicosis etiology. K.R. stantially free of fret lime in amount to product objection Relation batwaau th i thermal expansion and the proper* able efflorescence in exposure, the surface of the granule bee of ccraznia product*. W. H. E arhart. Ohio State being also substantially resistant to chipping and wear and im v. Enf Expi. Sta. iVnrr. 12 |2| 25-28 {1040).--The stable with respect to a bituminous bond. \v T ~ vcut.ag b :c c d . Lead as a i f ' , -3 :J5. ' "V . _ ^ ^ ^ v.j' e : ^ aci, a c d 3 Iso ( rorr. -+-* r , y ' \ ~*< e rV w '-;'r\ a ' k r n i t e U a d e x p o s u r e while rr.ar.u 7-'-' -.( >v*me '. f id a n d s t o r a g e b a t t e r . T h e b l o o d o. iV csritrels bowed a a d content which v a n ed from 3. rtl. Irr r-.^r \ .> co " i i h u ir>c a q of >. T h e lead r. j v i r p t o m s of p o i s o n in g , h u d Vvb 'N .i `ra'r.g.ng iron-. to l ' 1- g m . p e r l') cc .''b Y n Y a o of 1 '4 A u g m e n t e d c o n c e n t r a t i o n s of le a d in .-j-.ca te increased a b s o r p tio n of lead b u t do n o t c o n .' . ' V ' - v ' ^ e - c e of - j m b i s m t h e y a re a u s e f u l e s t i m a t e . c C Ce of e s p e s u r e C lin ic a l fin din gs m u s t . m . : ,e '0 cover -, th e u JfT-.osis of le ad pois onin g. - e r e s'a c .s .u s s i o n cf the probier.! a n d also of the valu e of s u a - -e d i e t cl le ad s o r t e r s 'A tth a h ig h c a u i u r n d . e t . -s less le ad a b s o r b e d fr o m t h e g u t t h a n w i t h a ,ow . ... Since i n d u s t r i a l l y . m o s t le ad e n . e r s ...< - -- g r th e lu n g s , th e c a l c iu m p r o b a b l y a c t s o Mt: P. *. H pT.CdcSS pOS^CS-liOUS- -- p - N* . .. j j r: V r - : . 4 1, 'Jf's-JT ( J a n . i'J-W -- T h e r e ;d o s e s < c r r t p e n s a i e d e y e in ji ir ie s m. N. e-w Yu i a t e ar.c th e c o s t wa.i 3 1 , 1 6 3 .0 0 0 f th e s e . S0*>c w e~;*~ c- a u s e-d bv foreign m a tte r entering the eye and could be avow ed bv the simple ar.d c h e a p m e th o d of w earing gogg.es \ entila- ion controls are needed for eye hazards ol toxic dusts and !.im.es a n d in th e p a s t y e ar the D ivision o. l i t d u s t r u . H y g ie n e h a s passed a n d a p p r o v e d -"000 sets of p.ac s or -ch c o n t r o l in f a c to r ie s . S p e c ia l goggle s a r e n e e . e d for protection against ra d ia n t energy, and faug-ue ot the eyes can be lessened or elim inated by proper illumination G --c u s se s these ight-savmg means and ir.et.ods__.or pro moting their adoption. . ` 5 -*1 r wo f a u i case of puLmonary asbestosis. h d I. !.O* 1 R i s s M r i Ai t ! >c c: j L u i u ' o I n i . 11, - b - a . __T h e first of '.hese ca^>es c z r j e i a w o r - a r ' i c d for t hur t y y e a r s m a fa::cr%- _s a s h e s '.'.s . , 1 ... .......... .. Vc.- m to e h i r e s a r c t h u s p r e v e r t it . r . . fa c t u r e of c c r d . he ><-. : r c ^ ' `h " ' >. , j ,.nh v v .? :;oou eu , r a r s ar. s ' h c ' : o-> l a c . c r y :: i. u c . r r. : co .bar bi'Xhc: r.si d c r a c c a * ~ ' l S C a: : v rj ' c L *. t Js .ucrex^ed t? j- c vxs 'C'kir. ; - e r life f rzrr. t r e r .ch il is a r d a s ! n a zz,z cf w-.ih s y r . p i s r j c ' a .u sr.c s-.^crc^ a :e died a: ip? C.sea.se. cear.-. Ludgs < ct w o r k e r s - fd . ; . 1 ; _, -- A rev e w .* r-. v r r - v ; ear s a f : e r hav. r . g c u p p e d w- T h e a - : c p s re c r. i r. e - t ect vr..c b k c r . i to ?:vc tu re ci tb e b.eakc. cf c e rr. e - t - e d .r. te r s ; ; a: v : . r ^ " o c f f . r ' d :e-5 ' S M :er c cu n tn ei nplofm ent benefits wcrkjs e s s l uses arc gi vtn iJhoos';-*v wfilaiss-'CnieiSt tfr.lugr.rdades ( ' UuOQ. A NOx "rr . 50, PTC \i->r pkyee re;?.vnr.i 1 . mp.iysema Tuberct M a n u f a c tu r e of hr r.c^.p(oyrr.?D'. c Pi s u n d e r _'.ht ' r.pioyrr.ent Con*.- . ,v v'C'.'.HCX A ' t iff. lb-7. p p 13-111 U S v . - . No- iy>. rr.sauoa Act :ot diSQualihed ' varr.e per.cxi ur recovering ccr.- :he 'vVcrkT.r. i ' 7' ; -? , 1940' -- C di e s the raw p roducts used in ...e ....................... r r o d u c i s . th e f o r m a t i o n of c la y s er.iatio a for ' --;xr n o n 2 :c crd-.ng to th ; pre rr. e C : ^ t : * C.d th e ir c h a r a c t e r i s t i c s a n d c o m p o s i t i o n M '~ I .: r.:ga a N'echauuam of d e v elo p m en t cf lead a n e m ia : I>. hvsiocbemucil nature cf the splenic and Uver u-sbancei i. p \j*. at l pp 1 vt : P n S . h!ch decrease e rrth u o c rte . h - _ ,;f g. ; ; ; : u -- A fter m ; e c 'u u n -.th .eao .etate. the sp.eer. ar.d liver seem to contain some speerne cal substances hicb are able to decrease the nu-..aer t ervt.ircxrvtes K atte m p te d to determ..ne the pbyxio- re m ic a l n a t u r e of these s u b s ta n c e s w hich w ere o b t a i n e d rem the splenic a n d h e p atic veins after m ;e c u o n of !-e ead T h e a n em ic a c t io n of th e splenic s u b s ta n c e d isap - ca-ed a fte r b eating for a n h o u r at 100* T h e su b sta n c e .as solu ble in w a t e r , b u t dad n o t d is solv e m e t h e r a n d T chcl it was adsorbed easily by anim al charcoal cr aac- n Its aetten was also retained alter ultravic et radiation 'T 3 hr **.b .M - Bxscpiiu--c A g g r e g a t e Lead Poiscciog . A n: H v g . D iv , I'>*;. P ? ~ - r e s ul t s of t he bxvppbw vcr.cjs form. Test r Lead Abscrph Oruo T?p; Hea::u. be tecr.tu tes: are y.ver F S . ,, , Legal Aspects of E n r ^ e r - t - . ^ * r"" 7\'i]ey & Sons. Inc . New \ ore. c d l p p P m e A i C y T his is a dir e c t application of the case m e t - o d to e =r ^ ' r ' mg problems, three hundred cases being seiecte- a,ter toot legal cases ac tu a lly dealing w ith eng--- " * proo .cms were carefully an a ly s e d . Ca ses d e ab n g w-.th co m pensation a-e of th e m o st in terest. S. p v e s a gener al i^scussion ot subject. C ases are giver, to dlusurate the fo-ow -ngpem ^ " M e u" t c h s m cf c u c l e o p r o t e m i in le a d p c . - o n i n g . G Iicjjet: : a v p 1- M o L f i v o .man. Med. A p p - M i a .warms u 10 5C 2- S2 IC 3S' -- O r ig in a l r e s e a r c h o n t e n c a s e s of elim ination of defenses, h a r a r d o u s e . - p i u y m e -- e - - . . - > e r em ployee relation, accid en ts arising ou t ol a n - ir^t-e cc-r^se of err.ployreent. proxim a te cause. awa_:d. dcpe-v-e-.c_y^x-- i V - c i s o a i n g bow th a t th e re is i p ro n o u n c e d te n d e n cy ;unsdictioo. , _ * L'* *_ . i uric a c i d e m ia ; thus becom es m ore acute as the poisoning M a n u a l of Lnd'ustr.al H e a l t h H a i a r d a . . j - . !clr ;" j n a T to w a rd s chrom city N o relation was seen between Service to Industry. West Hartford. Coon. I/O pp. Ppc e d - g r t e of u ric a c i d e m i a a n d k i d n e y f u n c t i o n , a n d no > i.0 0 -- F. presen ts m ethod for tne evacua tion of ' " T " * .ch c o n n ec tio n is likely to exist in cases of r e c e n t lead t r u l hygiene exposure resulting from m any dusts. po _ -t . Nj oa-t u. -r.ej c! a n t h r a c e n e focu E i p e r - m e n t a i Fr eSs.eMa r.c h , abnasdicr apsreosc.e d uTrhees hforrst mcahkaipntge r sugrivveesyspramn dci pd.eessc rwi bhiechsaa_^.e- 4 o S a v e l p i n : hcfui M i d . : 26, 2 1 - 3 2 ( 19-40).-- S. plmg devices. T h e o th e r c h a p t e r s are r v e n ove, .o w e ma . 1 re vie w cf the l i t e r a t u r e a n d of th e views of some teriais or g ro u p s of m a te ria ls which - a y c a .s e re c ;b a : c t a - a c w orkers who are of the c a m io n t.ha. disease. For each substance. F. gives -3 - e prate.:- r. cf the " a n th ra c o tic " pigm ent in the lungs u itJ certain physical prop-eruea. te Ca-^a - ,1 c x per. ma netehtrsa ct ve n Se lbeuatd tioron' heofc o nhcelmu soiloynt i ct h aotrigcainr,- bn .^a n/ THo t vaprrioodusu cceo oicne nmtraant.iotnhse. pthheysicoclnocgeicnabl- are. ^spnos nase^so . a r t i c i p a t e m th e c o m m o n a n t 1 - a c o iic fo cus; m the air cf ^ cuard&ecrrm. aatneds esaomuen dIerer nthoenlyT h n c i a 'dJ' orSk .mMe.n '_a acat t r.a'.ion ii* nr. . * . D i s e a s e ACL H R. r C E i S T E t . I ' di nni 7 7 . 7 - 0 ' a n . lim-." -- A f te r a n a i v t i r . g irVC_lUdC5 Uiti'Xl C O 1 . OCJS for t h e p r e p a r a t i o n cf star b a r d sow $ V