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FILE NAME: AT&T and other Phone Companies (ATT) DATE: 1939 DOC#: ATT029 DOCUMENT DESCRIPTION: Abstracts - American Ceramic Society Th A m erican / C e ram ic Sodety , February 15,1993 I hereby certify that the attached copies o f Ceramic Abstracts, Volume 18,1939, are true and accurate copies, which are maintained in the normal course o f business at the American Ceramic Society, 735 Ceramic Place, Westerville, Ohio 43081. Christine Schnitzer Product Manager Ceramic Information Center 735 Ceram ic Place Westerville. O h io 43081-8720 . . 614*890*4700 TWX: 7101109409 SC-ALL-01750 SCF-ALLF-00555 EXHIBIT <D Castleman Dec - Pfulb v. AT&Tj S C -C F R -.T 7 5 3 I > It > CERAMIC ABSTRACTS if * Compiled by v. The^Am erican Ceramic Society Volume 18,1939 Kos C. P n u r, Editor tEDitvot&bvoytJhC.y.GJVi.baWbh aSlcuxouiosc |> Aittuittianti Commuto on PMieeHoru: SJ..2D.,M, SaomiUuvjou*u. JaM. Cw. Poo,bWby. W . W msmr, A . N . Font. V ' ' '> DD.^A^.Bi5dd!!le*. Wxir1. H'. B*ru"*ci5'.^P, BudAnyijkuo^v.yJ^. C^.xCrhraistcot.n-.K1.M'W,'.C-Whu'.rBcha.rWile.M.-A. C: oCt.eB. Mev.aVli. Condolde P. S. Dear, Maurice Delangre, R. W. DtviUcn, Joseph Ford. W, D Foster V D Fr&bte, J. L. GriJap, j , D. Gat. R. A. Greeny. Mm H am sSeta, J. J. War), p. o! Heck! n* o* 2" o ? I T ' S 1M. Hutt, F .H jd t. Herbert Insler. C. B. Jean!. B. Z. Kamicb, Yoo Kora. WaltherKura, B, B. lane. V. S. de Marchi. X F Mar f l5 ' I ; t * Pb,UiP** A** Wactt. M. E. Poor. C. H. Rapp, Katherine Kf.Rkhardjoo, B. C. Ruprecht, A. B. Searle. Stanford SetcbdI. G. R. SMton. N. M ? Som^E. Stefaaewstd. E. W. Steaxei, A. G. Stem, Joseph Stewnt! f ! J?2w2SS: L` ^ TM ' Hwl* TkuTOauer' F- V. Tooley. E. J. Vachusfca. F. E. Vaerew^-k! Editorial Ofiu: 2535 North'Hi*h Street, Columbus. Ohio Publication Ofict; 20th and Northampton Streets. Easton. Pa. 18. No. 1P3P General 39 {5581 ification J ^ t i n u o n of aluminum du>t as a posw'liK- respiratory Jiness (cleanline of work plsa-t, bodily cleanliness, and rocas coa resulted from ihe appearance in 1034 a t the Oc- general hygiene), and (5) reduction of manual operations. SUbstanti urmjnnal Disease Clinic. Berlin, of a patient who had been H .S-S. consista prtyint aluminum bronze for nearly a year and who Preventive -messures in tbs us of crystalline silica. 3d salts,! .hptredritns of a lung disease of a not very clew character, M. -M. S have* . Jnd. Med., 7 18} 472-75 (1938).--S- pre- ferric eon fjriy in 1934 an Italian doctor of the throat and nose tents the subject systematically trader three major as * Provide jjtrie at the University of Rome published his observa- pects: (A ) medical. (B) engineering, and ( O managerial. ijO>. to tl upon the effect of alumiaum dost on the air passages. He suggests that, before any protective measures in the precipita! y^e present research includes (1) the component* and use of crystalline silica arc resorted to, the fact be estab Tjopeftic* of the substance (which does not occur in aa- lished that a silica hazard exists. Data involved include w f. G. _ 'ure in metallic form but is the result of mechanical and (1J a definite exposure to dust known to contain a certain 1.718. Sep, chemical processes). (2) 30 citations of previous studies on percentage of Silica and (2) sufficient dust exposure, ns g a iutH the injurioi effects derived from the preparation of estimated by dust count and dust composition, to cause preparing jluratnuro and Us industrial uses, (3) the- detailed case- silicosis if the exposure is continued over a sufficiently 1 molecule history of the patient, with laboratory findings and Roeal- ' long period of lime. In emphasizing (B), S. states that n at rijioo en studies. (4) an intensive investigation of 70 workers it is entirely the problem of the engineer to prevent salico- <uf5deat t in aluminum works, and (5) a critical analysis of the sis. The medical director ean only cheek the adequacy of tion of sub Italian data. The hazards were found to be completely the engineer's methods of control. S Jb ae tempen negative, both in the processes of making aluminum and Recovery metabolism of sUicodct. A. Bdtuur. Arch. :h to u u i irons inhalation of the dust. K.R. Granbtpalh. a* Gemrbehvg.. 5, 601-10 (1938).--B. re h sbitas Inhalation of dust and control of dust hazards. W. C. cords the metabolism studies and muscular tests applied J : James. Concrete, Cement MUI Ed., 46, 200-201, 216-17 to silieotics in varying stages of the disease to improve 1938).--Many persona inhale cxeessive dust into their their greatly unpaired respiratory capacity and muscular lunp, with coal and icon-ore dust coloring the lung (issue, action, if possible, and a t least to record the success or in most cases, however, these changes are of no more Im failure of such efforts. Tables show a comparison of the portance than callouses on the hands. Only two dusts metabolism of normal persons after 13 bendings of the actually cause diseases on inhalation, silicon dioxide (us knees (as in climbing stairs), after taking food, and after ay . Anox ually quartz) and asbestos. Only particles below 10 * rest with the metabolism of the silieotics (four having a .licosis <fe 4re effective, and these must he breathed in high concen lessened industrial eapadtr oi 80% and six lessened to 50 euli n tration and over n long period of time. A safe maximum or 60% capacity). Items tabulated include age and vital b inhalatioc concentration is 5 million particles ot quartz dust per en. capacity after food and after rest; respiration, minute and clinics It. The exposure of each matt should be reduced to volume, and O* requirement; the respiratory quotient, of artificial particle-hours to be comparable. The length of time conversion rise in % , and these values after rest; and the 3 sot coo necessary to develop silicosis is controlled by (1) con Oi needs (cc./mla.). In the severest forms of silicosis, the of svHeosii centration of dust, (2) proportion of free silics, (3) length total variation in the 10-tnia. recovery periods was higher ed. of exposure, and (4) general health of the employee. It than the highest shown in normal persons. A dd ab M JJ. is uxmroal to have silicosis develop in lest than seven yean. sorption had not returned to normal after 10 min* while ieiency uu Dust should be removed a t the source. W .B . in normal persons it was completed in 3 or, a t most, 6 mbs. (20137-35 Occupational diseases of the lungs In agricultural work The minute valuer of respiration in the most severely iff ditated bj ers. Rickajid Fawcitt. Brit. Jour. Radiol., -11, 378-92 subjects was markedly raised a ft the work attempted, mg system -June, 1933).--In 1936.749.700 persons were employed in and even after the 10 nun. rest, it did not attain ita pre i conveyers ;be agriculture of Great Britain, forming one of the largest vious value. The higher the lessened capacity for work :g exiensiw working groups. F., as a country practitioner In the In percentage value, the more the records varied in severe <of the eld hills of the Lake District, early became familiar with the silicosis. Experiments on early or middle-period sili material ts agricultural types of asthma, bronchitis, and pneumonia cotic* showed fewer certain, unmistakable results, their o or thret which usually ran a protracted course among these workers; working capacity being still much higher. lJt. H.E.S. -vcovtry. when occurring, appeared largely due to potas- Research laboratories ef Mellon Institute. Harry S. V. S. Pub. -is iodide and creosote administration. The infections Coleman, h i . Eng. Cbm.. Anal. Ed., 10 [9] 350-58 irtide. rep- :he working people are subject to are listed as organic (1938).--The design, construction, and equipment of the rt relcctm ruavtcr (microtungi. and bacteria) existing in grasses, reseandt laboratories in the new Mellon Institute building re material straw, grain, fruits, the soil, and in the excreta of farm are described in detail. Illustrated. . F.G.H. salive docu animals; only occasionally docs inorganic matter affect Research laboratory of the Columbia Chemical Division po! has evi them. r.;.. men carting siliceous stones. The details of of the Pittsburgh Plate Glass Co. ANON. Ind. E n g. JeaUog witi fungi infection and the procedure in identification are Cbent., Anal. Ed., 10 (8] 329-30 (1938).--The physical measures art 'jriedy and clearly given: types of fungi predominantly equipment is briefly described. Illustrated. F.G.H. resourceful- affecting six special groups ot'lann hands, hay-or grain UietyandJtycieAein the foundry: J, Medical aspects. :l>ed. Stress workers, stablemen, gardeners, etc., are described, with R . R . jon ss. Tram . Amrr. Foundrymtnfa A ttn ^ 1 ]2) intended *.hv resulting symptoms and Injury. Nine points to be 554-64 (1937).--The more important industrial health by testifies cuaridvred in a doctor's study of such cases are sysicmai- problems associated with the foundry industry are those xammatioa -'Jllj- presented for case-history record. Special com- related to (a) general physical characteristics of the budd to allow tin utvut is made upon the agricultural groups, with citations ing. (4) housekeeping practices, (e) drinking water supply out process. mm ease reports; 13 large-sixc radiographic rcproduc- and lunchroom and toffet facilities. (<f) exposure to extreme KJL. ** of chest phenomena in the various fungi invasions temperatures, (e) exposure to toxic or irritating dust, .rx Seceso, .oncentcd are interpreted for the lay reader. F. emphasizes fumes, and gases, and (ft medical supervision. Success in cusses the :tu-je occupational diseases as rare, seldom reaching radio- the control of industrial health hazards b primarily de Its and the ><i.Kat departments o r diagnosis.- Yet common micro- pendent upon the employer"* attitude toward the problem. n with such angi. often innocuous, do Verana- pathogenic under ccr- Discussion. J. A. Britton it al. bid., pp. 576-88. ay mineral*, uiu conditions. The incidence of harmful infection is H.E.S. er increased i:u>rc common and mere widespread than is generally Hermann August Seger. Akos*. Bull. Anitr. Ceram. bid.. `valizvd, 19 references. K.R. See.. 17 (111463-64 (193S). id shapes is Practical significance of silicate research. A. Distzel. Silicate research and engineering. W, Eitzl. Z. Ytr. itish Patent Ber.. 14 (5| ltil-64 (1930). J.F.H. Oeut. h f ,, BO (2| 37-41 (1936).--The conditions and Process for Prevention of disease In industry, D. Hunter, h i . status of silicate research as carried out in the H aber the like e> ver-it, 15,134-36 (1937).--Thu main principles underly Wilhelm Institute in Berlin with regard to gloss, ceramics, R .I . ing the prevention of disease in industry arc (1) protection cements, mortars, and concrete and the relation to ap tu especially workmen by law such as workmen's compensation acts, plication in practical engineering are explained. M.H- . Gfire'bekyf* medical inspection under stale support, (3) education Silicosis among grinders. J. L. A. G rout. Brit. :;wough in- -- t the nature ol the danger. 141 importance of dean- Jour. Radiol., H, .-UkUTii (June, I03SV--Thin interesting r . * \ N o . 2' 1539 C entral 83 / i and re-' U tie too. tie r jefe in tu however, i are r*hen sad o photo-, l having: .*a static, ne points surfaces. . Debye the font c X-rays t Icarus length, diffracted that they the pria' a on the a formed. Jberoeat- made 5. xamimag: .n where. way that: diagram, ter inter-', f Debyed by re is turned' the tiny of curved* . Roe, boratorus1 (11 33 3L.Y.C. ed. "Osr . Leipzig .4 7 13351 reidited; . jf ceramic chemical are men* J book is R_VH. materials, king Co.). a affleat*-, A ParaV. 9. 1938 CCCU-OCS 2,137,058, with high eh. Ceverbe authors .tie to high jeh as are water-cooconditioss. . high tern- as such is V) decrease cooditioas -vr. so that :il as a fuU- -jute labor limit in the German hard-coal industry for ff atmospheric localities, is aa arbitrary limit. In tenerai. working capacity seems to be lowered by Ugh temperatures to 00% values. The physiological reactions e{ men continually vary when climatic conditions grow constantly worse. Injury to health from dry and high temperatures alone can not bn definitely established, the relation to humidity present always being a factor. Omit, dog tits heat factor, a humidity of 23* seems endurable, la regard to the elimination by the skin or lungs under high and humid conditions, results appear personal and individual. Greater water elimination occurs In men acclimated to hot humid air than in these not b u n d . Men habitually rather than occasionally a t work bsm larger quantities of water. Rising temperatures in a dry climate and rise in humidity increase elimination of. water through the skin. Individuals showed, in their elimination through the skin, none of the expected cor. ttipondenees which might be traced back to these chang ing environai states. In this iavtstigatiou. bodily tent, peraturts generally rase very little proportionally under higher outside temperatures and increased humidity. Blood pressure, respiratory frequency, and pulse frequency showed no quaetitative relation to selected climatic con ditions. Fourteen diagrams and two tables are given. 18 references. KJL Dust content in an asbestos!* lusg ta d the behavior of die so-called asbestos!* bodies. X. Svx&tcs an A, Bvcnss. Arch. Grxtrbtpath. 6* .Geverbehyg., 8t 26-70 (1937-1938).--This research upon the effects of asbestos dust when breathed in by industrial workers in asbestos was carried out by the S ure Geologist and the State Chemise of the Swedish Geological Survey. They indi cate the differences between the asbestosis lung and the nlicotie. the former- being due to the action of a basic silicate (isotropic), accumulating is yellowish o r reddishbrown necdle-lika masses, and the Beetle being due to quarts (SiOi) degenerative action, exhibited in nodules sad ocher quit* different manifestations. Asbestosis was first identified in 1908 by an English physician. Montague Murray, of the Engjiih Compensation Com mute of Industrial Diseases. The chief research studies since that time are reviewed by these authors in their emulative value. Their own procedure in isolating asbestos dust and its accompanying "asbestosis bodies" by- treating the affected lung substance with hydrogen peroxide, also by purely mechanical action upon a "heavy" Mlutioa, is given together with the ascertained percentage values derived chemically from the eight or more mineral components of asbestos. For the entire lung, approxima tions were 3.6 g. asbestos bodies, 0 2 free asbestos needles, and 1.4 to u t asbestos content- Total dust respired by the given lung was about 2-S C- Some of the bodies built up in needle form were composed of titanium oxide (TiOj. Intensive study and analysis of the coverings of the bodies stem to Indicate th a t they arc blood derivatives after the mineral has entered the lung. The fibrosis ultimately' and generally distributed through the lung following the' cast inhalations appears to have definite relation to the presence of the asbestos needles sad their movements auout the lung under thu mechanical stimulation due to respiratory movements. 12 photomicrographs. K JL . Heinrich Hits. Anon. Ball. Amtr. Ceram. -Sac, 17 ;12: 4PO-91 (1938). History of glass industry at lftw York World's fair. Anon. Bull. Amet. Ceram. Sot.117 112J 489 (1938). Hyriemc dangers of Bosferrous metals. H . Bsacex. Jc sih in u h a fi. IT |32J SU3-07 (11)33).--B. discusses the ngers in handling Pb. Hg. 2n. Cd. As. Yb. Sc. Te. Cr. A*Cu. Mn, light metals, 71*. Tl, and Os due to inhalation of ou>t of vapors or contact with each individual metal and ffivsn* for eliminating or at least minimising the risk. , M.H. Ltug findings la foundry workers. O. A. Sandc*. 'fr. Jour. Pub. Health, 28, COl-tlO (1(08).--Of the JUnatts occupation in foundries, sandblasting is the most -uarduu if done without protection: otherwise sand `atppittgand grinding of large castings are the most danger ous in regard to the health of the employees. Data obtained during a four-year survey ere a* follows: Yean erpanre No. urlam i SlUiwi 1 I- 3 15-10 IM S 16-20 21-53 20-30 31-40 41-30 1174 0.3 S12 3 602 3 S32 10 383 2CS w13 213 21 47 21 Pram this data, S. concludes th a t simple silicosis as sees in foundry workers is only very slowly progressive, so much so that no visible chanres appeared in four years observa tions, and is only rarely sufficiently advanced to cause symptoms and incapacity for work. Control of the foundry hazard is best accomplished by elimination at Its source of the dust generated by sandblasting, sand chip ping. sand grinding, and shafce-opc operations. Pre- employmeat and periodic examinations are essential to prevent tubercular individuals from carrying on a dusty trade and to discover suit infection and reactivation cases as they arise. 8 .C JL Selenium a t e potential Industrial hazard. H- C. Dudlzv, V. S. Pub. Health Refill.. S3 (8| 231-92 (1938). --D. points out those industries which may have un recognized hazards due to the possession of selenhimheanng materials. Increasing uses and applications of the clement sad its compounds necessitate the warning that in certain combinations selenium is toxic. Hence, in dustrial plants where these substances are utilized will need to afford their workers adequate protection. Sele nium is obtained as a by-product from electrolytic refitting of copper; this b the chief commercial source. Xu first use was largely confined to the glass and ceramic industries, where it was used as a glass decolorizer and for the pro duction of red glass and glazes. Rubber manufacturer next made heavy demands on domestic copper refineries: recent Increased uses have not only exhausted domestic supplies but have required importation in larger and larger quantities. The ceramic industry alone has utilized more than 170.000 lb. According to DTM new sources of supply will have to be opened. The occur rence and location in 21 states of 13 minerals, with the selenium pans per million, are tabulated. The selenium content of the earth* crust has been approximated at 0.005%; nearly all sulfur and sulfide deposits contain it: certain western phosphate rocks show amounts of even 33 pans to the million. In a large number of *03 samples uken from areas surrounding smelters near Butte and Anaconda, M ont, Sennet. Calif and Copper H31. T eam .' selenium was found: i t decreased in quantitity with distance from the smelter. Extensive animal experimenta tion by fegetring'oclemum compounds -shows th at such substances, when soluble, have toxic effects, both acute and chronic. Early cellular destruction occurs in the liver, with later pathological characteristic changes throughout the organism. Guise* pigs experienced tevzre metamorphoses in the Uver and. after inhalation of hydrogen selealde, hypertrophy of the spleen. Men employed in copper refineries which extract or purify selenium display the symptoms, respiratory sad gastric, which characterize metal poisoning generally. The excretion of selenium in the urine, however, is conclusive evidence a t selenium absorption by workers. D. gives in detail the procedure for urinalysis in detecting and estimating selenium in the urine. In the tabulation of industries with possible selenium hazards, the glass and ceramic industries are in the secondary group, tz ., they utilize selenium and its compounds as basic materials in manufacturing processes. The immediate sources of hazards involved in this group are given as melting pots and furnace, the fumes of Se and SeO- being given off. The sampling of vapors and gaseous constituents of in. dustrial plant atmospheres and contaminations of labora. lory workrooms is explained in detail in connection with 108' Ctnmic Abstracti Vot. IS. Xo. ,s lo ts sad indicium juu how closely the sampling repre sents the true character of i hatch of material being tested, f,? S . Volumetric analysis of copper. M. Sccrnt AXO Y. V l u .v n m Jour. See. Ciem. lad. Japan, 41 [2| MS (1933),---Cooper can be reduced to the cuprous tod io aa alkaline solution with sodium suldte. This cuprous iea can be titrated with potassium permanganate solution. After the reduction is complete, the solution it acidified to expel the excess sulfur dioxide p u . Ah addition of s small amount of chlorine on in the lorn of sodium chloride is necessary to avoid the precipitation of cuprous oxide. The sample Of solution containing about O.lti g. of copper should be treated as follows: pour the test solution into a JOO-cc. disk, dissolve it in a small amount of water, and make it slightly acid. cither with sulfuric acid or sodium hydroxide solution: odd 30 cc. of 10% solution of sodium sulfite and 8 cc. of 10% solution of sodium chloride; boil and dissolve the yellow precipitate in the flask (double salt of cuprous sulfite end sodium sulfite) and make the solution colorless; add .50 cc. hot sulfuric add (prepared at this time by mixing `JO cc. of :Hi .Ysulfuric arid and -`JU cc. of d .V sulfuric acid). The white prt. cipitate of cuprous chloride is formed, and sulfur dioxide gas Is expelled violently Boiling is continued for 13 a JUmin. to expel sulfur dioxide gas completely and to exp: excess hydrogen chloride. To fill the flask with carbon dioxide. 3Ucc. of 3% sodium carbonate solution are added Keating is discontinued nod the solution is din ted with 1/10 sYpotassium permanganate solution which contain about 3% sodium carbonate. The presence at P b \ Stt'"\ Ma*. etc., has no eject; therefore, bo preliminary xepara. tion of these metals is needed. JC.Y.C. PATIXTS Making alkali metal silicates. C. R- ifcOxKtr. Diamond Alkali Co.). V. S. &15X572. April It. 193* March 7.1933). Production of pelysUieatet. Dzssavx Fils. Fr. $K . 732. Occ. S. 1937: Otem.-Zig., A) (19) t73 (1939). D.A.B. General p it conditioning in industry: L V . L. Flxuhuu A. H. Sr.tcar, F. C. Hoccimw. ano } L b. Pu s i m h . Heating, Piping St Air Conditioning, 11 (21 107-11 (1939).--This study was conducted in the research labora tory of the American Society of Hearing and Ventilating Engineers at the Pittsburgh Experiment Station of the tf. S. Bureau of Mines. The physiological.reactions of men while carrying on light work in atmospheric condi tions including effective temperatures from 77? to 92*F with relative humidities of 80. 75. and 90% were inves- - tin ted . The history of previous investigation* is dealt rich. Two charts. JX.G. Appccranes sad prevention of aOIcoxii and tsoextoai*. Esnuco C. VtaUMtt JUu, Sled. Apptieaia Laeore IivL. 9, 387-94 (1933): Ckm. Afa.. 33, 4 4 (1939).--A review is given. Ashesteria. R. R. Savsm ano W. C. Dxxaaa.v. Amtr. Jour. Pub. Health. 29 (3| 205 (1939).--la s study of the bfarth Carolina textile QtiUi using asbestos fiber, a hy drated magnesium silicate containing no quarts, pul monary asbestos* was the principal defect found. Ex posures ranged from 0.10 to 75 BuUion partides/eu- fa Person exposed,horn 5 to 10 years to dust concentration* exceeding 5 million partides/eu. ft. showed definite evidence of asbestosis. Data so far obtained indicate that 5 million partides/eu. ft. is the maximum safe concentration. B.CR. Ceramic filter*. Jcnut. Cktm. Age -(t ondonj. <0. 45 (1939).--A new range of porous ceramic filtering mate rials has been introduced by Glasgow firm. These ceramic materials are resistant to corrosive fluids and re made with a pore sire ranging from below one mteron up to several hundred microns, the distribution of pores and pore density bring exactly regulated. The material* are produced in a great variety of shapes--they can bd sawed, cue. or ground to suit individual requirement-- and their mechanical strength and durability are very high. The materials, quxrtrite, biscuit porcelain. Sod dialcmaceouj or kteselguhr bodies, are described as fol lows: (l) Quantise filters in the form of square or drcular tD*. of different thicknesses and sir*, and hollow cylinders from 2 in. to 8 in. ta diameter and up to 24 io. lone are produced in several grades, varying from coarsegranted bodies of extreme permeability down to a dosegrained type with a pore sixe as low ss 10 mkreas hut of tuch high pore density that it ensures rapid permeability. The-high rates of flow obtainable with these filters are exemplified by the P27 grade which gives a flew of 1700 gallons of watcr/sq. ft./hr. s t 5 lb. pressure. Quartzite filters are particularly suitable for industrial filtering and aerating operations of liquids and gases, especially where resistance to corrosive fluids is essentia) and in reactions between liquids' and gases, as it presents the gateau reactant in the form of minute bubbles, thus giving tis maximum surface for reaction. (2) Biscuit porcelain it used in filtering operations where it b necessary to pi rate extremely minute particles from acidic or ocher cur- roshre Uquocs. I t resembles porcelain in color and ees- potidon, but differs from it in that it is highly porous. lit pore dimension can be regulated in size from 15 micraa down to below 1 micron. The 'nature of Its ingreditsa and the temperature at which it b fired ensure resist.-: to acids by the more siliceous bodies or to caustic alkiui (where the alumina content predominates). Bisect porcelain b also used for electrolytic processes la tit - filtration of oils sod concentration of rubber latex. Dtatomaceous or kiesrigubr bodies, while teas resist t to corrosive chemicals than either biscuit porcelain c quartzite, combine small pore size with high permeabtlitr * and are used for the filtration of neutral, or nearly neutri. liquids. They are usually employed in the form at caocia or hollow cylinders of small diameter, doted at one tm , or with both ends open, up to a length of 12 in. A.3-5- FTccfs (or industrial purposes. R- Frrzsucstcs as: F. M. Lca. Read before Inst. Cheat. Eng. and lei: - Struct. Eng.. London, Jan.. 1939: abstracted in C at Trad* Jour., 104,79-80. 112 (1939). LJt-B. industrial Impairment of health and poisoning In & metal-working industry. Fnnm a. Obetflidtenttsh,. 1* (4135-35 (1939).--F. discusses the danger of siEcosU a men working with sandblasting. `Poisoning by its gases In pickling, etching, and coloring processes, by C* . s i t s bt C r plating, by Pb la Pb welding, by CO in oxr * acetylene welding, and by toxic gases developed in nip!- ing and hardening processes b also discussed. MJL Ilf* and- work of Henry LeChateUer (1530*1930). r Pascal. BuU. Sot. Chim. Stem.. (S| 4 (10) 1557-Wj (1937): tee Butt. Amor. Ceram. Sot., 15 (4| 155- (19>- Ceram. Air.. 15 |10) 315-22 (1937). D.A.5. MRSTl Repairing cement for ceramic objects. E. Rosextx'- Brit. 500,375. Feb. 22.1939 (Aug. 12.1937). . Satin white pigment ana process of malting. L - Won*. If. S. 2.145.149. Jan. 24.1939 (Feb. 4.1935). process comprises treating finely divided day with arid, producing thereby a solution containing aluff.ufi^ sulfate together with coloring impurities and aa asara;-' day residue, removing coloring ingredients from the tion. and reacting the so-purided solution with hydra:*' lime in the presence of the day residue. THe for use in sewage filters. J. E. Tcctcce. # 500,378, Feb. 32. 1939 (Sept. IS. 1937). SC-ALL-01780 SCF-FA-0650