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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 CERAMIC ABSTRACTS Compiled by \ TKc American Ceramic Society Ross C Pimor, Editor j>Makv J. Raocuyt* Esoly C. Van Schoicx Assistants Doxotsy J. Ttntxxx Committee II Publications: J, D. Sctxrv,ur. Chairman, E. DC F. Cuxns, R. F. Shxxwood, W. W. Wctstox. R. C Pttxdy Volume 16,1937 Ahttrectersi J. B. Austin, A. A. Ayan. Rudoll Barts, A. C. Berm. Devida* Biiwaa. L, T. Brow-nmiller. W. H. Bruckner. P. P. Budnikoff and E. Stefanowsky, J. C. Chastoo, W. M. Cobs. M. V. Cosdoide, Maurice Delanpre, R. W. Devillerj. A. H. Emery. W. F. Ftgee. R*. D. Foster. J, L. Gallup. J- D. Gat, P. E. Grotts, Max Hartenheim. F. G. Heck. R. A. Heisdl. E- B. Hewitt. J. N. Hill, G. 51. Hutt, J. F. Hyde. Herbert Iosley, C. B. Jenai. B. 2. Katsicb, B. E. Kinl-ulbia. Seiji Kondo. E. H. McClelland. F. P. Peters. G. M. Petenen. C. J. Phillips, J. G. Phillips. R. H. H. Pierce, Jr., Alexis Pincus. Katherine Reed. H. K, Richardson, A, B. Searle. Stanford Setcbeli. M. C. Shaw. G. R. Shelton, H. E. Simpson, A. P. Sera. Erich Sterne], H. H. Stephen son. A. G. Stem. B. H. Strom, L. E. Thiess, E. J. Vachuska, F. E. Vaerewyck. F. J. Zvanut. Editorial Ofict: 2523 North High Street, Columbus, Ohio. Publication Office: 20th and Northampton Streets, Easton. Pa. i . 10. No.* l93t Chemistry and Physics--Generaf 137 rdroxyquina, Ktram. Ct^_ been plotted la a ternary diagram. These results determine implified d*. .Sow that the pigments of the belt hiding power* were pre pared from solutions with a titanium dioxide concentration detail. S* filling between 13 and 10% and ratios ranpine from 1/1 E.J.V.z 1/0.65. Seeding opalescence occurs at different hydro- ia clay* aogi .{O-ioB concentrations with different concentrations of rrx. Zavoi sjtunons. Illustrated. F.G.H. '8. & E.S. j t atnminn^J Viscosity plasticity of disperse systems: VI, Ef fect of temperature and electrolytes an the plastic proper . Jour. JbJ ties of kaolin, M. P- WoLAJtowmmi Aero D. If. Tot* >: BLP.9S7.I not. Kolbid-Z., 73 U] 92-96 (1935): - see Ceram. Ait., re convene J Id [3] 101 (1937). VH, Plasde flow ia an apparatus with Thts w<j> trlinder* displaceable lengthwise. D.M. Tolstoi. Kol- oxide. AltOt value for th 0.002. * ILA.H.; tiZd-Z.. 73 (If 96-101 (1935).--A method for determining the flow resistance and shearing modulus of high concentra tion mineral suspensions is described. The apparatus was designed particularly to eliminate surface gliding of.the ent. H. I cylinders. Results agreed well with those obtained by the 933); CJxi. routine cylinder method of Wolarowitsch. At very small velocities. Bingham's equation for plastic flow does not hold for high concentration mineral suspensions. For Pam I-V see Ceram. Air.. 13 [7] 222 (1936). F.P.P. * FATtJfTJ Alkali - silicate. Andixs E. A. Coanxuus (Helios Kemisk-Teicnisha Fabriker A.-B.). Swed. 80.000. April 4. 1934. Om. Air.. 29, 6000 (1935).--Steam Is blown into an electrically heated bath of alkali silicate formed by the reaction of alkali chloride and SiOt. During the process the bath is kept covered by a layer of the urunelted charge of alkali chloride and SiO,. with or without another substance, t.g., lime, for the formation of double silicates. hfethod of manufacture of precipitated tine oxide. G. Axtohoff. Brit. 459,233. Jan. 20, 1937 (June 5. 1935). Production of a calcium siuminate suitable for the manufacture of sodium aluminete by treatment with soda iye. AKrtssEUXArar Noxsx Aluminium Co. Brit. 457,676. Dec. 16. 1936 (Aur 30. 1934). oxidizing ac j of 5eO> an General nature of tbt at SeOj pt* Animal silicosis. H. Sxncxcvs. VerkanH. Deal. references. Pali. Cts., pp. 262-71 (1934); Chem. A hr., 29, 8169 d. CKASfJB 11933). (51 299-30) J Causation of pneumonoconioses. Pmtuf Dm?rsaa. residue aftn Jour. Ini. Byg- & Toxicol.. 18 |S] 524-36 (1936).--The Udc add hr various pneumonoconioses and their causative agents are tsoIubtUty rf discussed. Silicosis and asbestosis arc definite diseases; h aathraco-filicosts and various silicatoses, modifications usrta srocod aia-tize tree- of normal lung conditions are seen. Effects of carbon or Jon of hydro carbonates, gypsum, and iron oxides are also discussed. hr. Result: Methods of estimating dust exposures of a workman in i fairly gr clude the taking of dust samples from the work place and red. all of t> interpreting the results during the man's total period of The rate exposure. Errors made from estimating the composition reaseingrah of dust from samples which have settled upon rafters in- EJ.V. nead of using samples taken from the air are emphasized. rusits. A Permissible dust concentrations need, not exceed 50 million is.. 29, 71C particles per ca. ft. for dust with very low quarts content 167 (1935). or 5 million for pure quarts. In defense of the use of Sde with sd standards of dustiness, the experience in S. Africa where ompt. "Rtni. dtst standards have `been applied successfully for many which estsb- years U cited. . EJ.V. f Sc, and C Charles If. Brady. Anon. BuU. Amer. Ceram. Joe, instants **** ` 14 12) 73-74 (1937). M.H. J Chemical considerations on some pneumoconioses affecting pip (uthracosis, silicosis): I, ITatnre of the problem. Res'i IVosx. Iri r**r. Congr. Chim. Ini.. }4th Congress, Paris, 5 pp. late solution 1934); Otem. Air.. 29, 5774 (1935). ric anhydri* j Clinical aspects, diagnosis, and treatment of pneumo- cial titanittf tstottiosi*. \l*. InviNc Clakjc. Jour. Ini. Hyg. 6* ion with'*^ | ` oricot., 18 [8| 537-49 (1936).--Pneumoooconiosi* is a with orthotf < <iiaie resulting from the inhalation of inorganic dust. ectivdy, 1A .f good hidiri The two pneumonoconioses which produce disability are tdicosis and asbestosis. The pathology of silicosis is char- astc ritaniuS acieriied by the presence of fibrotic nodules scattered ccd nuciei. * through both lungs, and that of asbestosis is characterized ies or bidiri hy an interstitial fibrosis involving the lower half of both ; ompositioB J^fs. The symptoms of silicosis and asbestosis are sirtti- ydride-waCf the most important being dyspnea. The most com- -t*00 complication is pulmonary tuberculosis which. Ta silicosis, ia a frequent cause of death. The diagnosis of both silicosis and asbestosis is made largely by a cturela tion of history and symptoms with the X-ray examination. The treatment of pneumonoconiosi* is preventive and symptomatic. The course of silicosis and of asbestosis ia slow but eventually leads to incapacity due either to the disease itself or to a complication, frequently chronic pulmonary tuberculosis. The number of workers exposed to harmful mineral dusts in mining and in industry in the U.S. has been estimated as 500.000. EJ.V. Clinical hematological studies for the differentisl di agnosis of industrial silicosis. C. Sooomca Arm F. A. Jvolts. Klin. Wockschr., 14,9S7-92 (1935).--The authors have experimented with the pathologicai.anatomicai 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 been able to investigate the condition of the lungs of silicotic patients. At the policlinic of Bonn University, RSntgea observations of the last 190 silicosis patients were taken, and these were analyzed according to -pure radiological points -of -view. Various tables showing the bloodcounts of several silicotic and tubercular patients were compiled. After certain pe culiarities were established in 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 clinical R6ntgeaological status. To obtain a most secure foundation, it was decided to separate those silicosis patients from the others who showed an important degree of tubercular complications. A characteristic blood status was shows in stone 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 forms of lemkccytes in a streak prepara tion. The same symptoms, even if less impressive, ere shown in a second group from the total of silicosis patients as positive cases with tuberculosis complications. W.F.F. Colored ceramic aggregate for decorative concrete. L 13S Ceramic Abstracts VoL Hi. N.: C- W. Plavjv. /ear. A met. Ceram. See., 20 [31 90-9(5 (1937). Diagnosis of silicosis. Emeky R. Haykckst. Amtr. Lobar Let. See.. 20,61-66 (133(5): abstracted in loojr.ltcd. Hyi. if Toxicol.. 18 [3| 131-32 (1936).--Factors necessary to diagnose chronic silicosis are: (l) exposure to silica dust in sufficient quantity for 3 to 20 years; (3) determination by intraperitoneal injection of the nodule-forming char acter of the dust: (3) nature of the work; (4) personal fac tors such as mouth, breathing, previous respiratory dis eases, etc.: (3) X-ray findings. Serial pictures should be taken over a period of time. The location of the nodules is characteristic, avoiding the periphery, symmetrical distri bution. 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 ate negligible in the first and second stages, but later cough, dyspnea, pains in chest, etc., may occur. E.J.V. Economizers and air preheaters. V. Walks*. EUe. Rev., 119 13082 j S33 (1936).--'W. discusses the conditions which govern the design of economizers and air preheaters for use with boilers. . J.L.G. Epidemiological aspects of silicosis and tuberculosis. Altov S. Pors ajto David Zaces. Amtr. Ren. Tubcrcuto- lie, 32, 229--12 (1933): Cum. Abf.. 29, 7334 (1933).--In representative groups of both granite mad foundry workers in Massachusetts, the frequency of silicosis and of silicosis and tuberculosis was correlated with the duration of ex posure to dusts containing free silica end to the concentra tion of such dusts in the occupational environment. Among granite workers silicosis was found in 15.3% 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 in foundry workers and 4 times that in all males of 20 years and over. Among the employees of 10 Mass, foundries, silicosis was found in 8.8% and with tuberculosis in 2.6%, a total frequency of one-half that in granite workers. The silicosis in foundry- men was not only less frequent but also less advanced in degree than in the granite workers. Pneumonia, causing oae4burxh.ofall-the.deaths.of foundrymen, is the.greatest occupational hazard.in the industry. Industrial health hazards and employer responsibility. W. J. McConwil. Trane. Amtr. FoundrymtiCt Aim.. 7 (11161-63 (1936).--The importance of greater attention to the problem of overcoming industrial health hazards for foundry employees is recognized. Medical aspects are discussed, foundry hazards are outlined, and suggestions for a control program are given. D- E. Cotsnvcs. /bid., pp. 166-79.--With the invention of the machine, dust became an industrial hazard. C. discusses the action of dust in 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 ticle sizes. The silicosis problem is complicated by the fact that in many cases there is also decided evidence of the presence of tuberculosis. In foundries many men with normal lungs work for years and do not coatract silicosis although there may be evidence of fibrosis. C. explains the action of dust particles inhaled 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 pulmonir? infection or injury. It is the executive's responsibility to inform, himself on dust hazards, conduct surveys of h;, plant, and inaugurate a program of control. Prospective employees are grouped into three general groups; thot which are fair risks and those which should not be employe: are indicated. C. recommends that an educational pm- gram similar to that used in "Safety First" campaigns be inaugurated to combat the dust hazard. Discussion Avxy <t oL Ibid., pp. 130-90.--The various ways of pr*. venting Alness are pointed out. and precautionary measuni taken in the foundry are outlined. K.E.5. Industrial pulmonary disease due to inhalation of dust, with special reference to silicosis. E. L. Midolbt^x ' Milroy Lectures, 1936. Lancet, pp. L-9 (July- 4); pp. ,19 64 (July 11, 1936): abstracted in Ioar. Ind. Eyi. or 7Vri- eol.. 18 [31 129-30 (1936).--Tbe first lecture is devoted :: l&tcoiis. as being the most important of the poeumonoco- nioses. Particular attention is directed to the oceurreao: o( the disease according to occupation. During 1930 1934, at least 1321 deaths occurred in England and Wales, of these, 372 were caused in the sandstone industry, n: 326 were ascribed to coal mining: the manufacture of pot tery claimed 270, metal grinding 142. gold miners, turned from S. Africa, 104, and tin miners 91. The disease is always originated by the dust of fine particles of trss silica: the way in which this risk is present in a number ri industries is explained. Sandblasting and the manufsc- ture of abrasive soaps receive special note, as in both tii hazard is so intensive that the onset of the disease ti uz- usuaQy quick and its course rapid; thus only 3 or 4 yan of employment may have preceded the onset, instead 15 to 20 years as in most other occupations. The occur rence of cases in coal mining is unexpected, since coal ttsec is not a dangerous dust; apparently the disease ss origi nated by dust arising from the rocks among which silica it found or from impurities in the coaL Out of 169 deaths ~ all coal fields in Great Britain, 147 came from S. Wain, this undue proportion has not yet been explained. Tit picture, both clinical and histological, becomes madiirr when silica is mixed with other forms of dust; when coal associated in the dust, the condition is known as antbracr sis; here the fibrous tissue entangles the coal dust and " tains it to help in blocking up the lymphatics. la : second lecture tbe influence of the dust of silicates. i.t of chemically combined silica, U considered. Of the**- tsbestosis stands out as most toxic; the particles consist fragments of fibers, some 3 microns long and '/: miens, i diameter. They originate pulmonary fibrosis which - more generalized and less nodular than that of silicoi-: the condition develops quicker chan silicosis, but the ten dency to succumb to superimposed tuberculosis is not - pronounced. Other dusts considered are those of siL* manite, china clay. talc. mica, and sericite; none of then approach asbestos and silica in their dangerous qualities The harmful nature of any dust may be tested by notit* the reactions which follow when it has been either injeri.ri subcutaneously or administered by (he tracheal roc" suspended in fluid; injection into the peritoneal caw? may also be employed. The theory adopted is that dci- exert their harmful influence by reacting chemically wi- 16; No.'< General i:i generis, xdmooai) ponsibfla, veyx of ha `rospooiw <p*: tiu* i employ* :*oo*l pn. vputn^ >iscua*im, Vep* y means* K-EjS. OB of ixo^ ltDBLtnt *); PP. 54 -1- rt Tni. devoted U euiaoaoA occurreaa a* 1930 it end Wlo; lustry, and rare af potraineri, rt- The disco* -des of 6b i number af e manufae- m both the lease b i 3 or 4 yesh . instead d The occtffre coal had ue is oriphich silica iS deaths at a S. Waits; lined. Tt* :es modifies when coal s' as anthraeo dust and re ins. -In the. litotes, i-t~ . Of these. !es consul d ' micros is <is which of silicotic but the tea ms is not o ioe of ssUr tonc of th0 ms qualities, ed hr aotiid [her injected tcheal rout* oncal caritf is that dust? micaily with petbsue* uf the luug*. the life and structure of which are thereby modified. Each form of dust stimulates a special retina of its own. while mixed dusu set up a mixed re^ioo. No evidence it put forward that dusts other than 0* oT silica or silicates are harmful, or that any dust is apable of reducing the toxic influence of any other. E.J.V. lavesttcations on quarts and aericiu analysis of Indussisl dusts. F, SAnTotutrs and . W. JGttek. Arch. g--j. & Bohieriol., 115,135-31 (1933); abstracted in Jour. Sod. Bjt- & Toxicol., 18 [4} 54 (1936).--The separation of tattoos mineral constituent* of dost* by the use of liquids baetnr suitable specific gravities is discussed. The stand ard methods of mineralogies! and chemical analysts of dusts are mentioned, with e description of the X-ray el imination. Some of the common minerals are shown. Mention is made of the mineralofy of sericite. E.J.V. Methods of dust control. J. D. Larrca. Traoj. Amor. Foundrymen't Afro.. 7 (If 209-21 (1936).--The point to begin elimination of the dust hazard is at the wurce. Methods used for controlling the dust hazards origmatisg at different types of sources are described. L. discusses the general methods used in dust-suppression problems and the estimation of the hazard, contending that the efficiency of a dust-collection jyiwn is best deter mined by dust counts. Methods used for testing ven tilating equipment and the selection of fans are presented, fhist collectors and respirators, such as helmets, filtertype respirators, and positive-pressure masks, are dis missed. Maintenance of equipment is necessary to the successful operation of such equipment and to the effi ciency of any installation. A discussion is included. H.E.5. Molding of clay after heating at serious temperatures. R, JtoMTO. Corricrt Ceram,, 15, 221-23 (1934); Chrm. Zrr.tr., 1934, H, 3298; Brit. Gum. Abt.-B. 54 [27] 591 '1935).--Heating at 1U0 to 500* before molding increases the apparent porosity of the product fired at 9W* and de-rea$^5 the resistance to breaking of a specimen dried at Homograph for ceramie calculations. A. A. CosinskiI. "t*rpory. 3 [fif 374-76 (1935).--The nomograph facili tates the chemical analyses and the calculation of the amount of ojridei is the fired product and of the raw ma"'rial required for a given quantity of the Tatter. P.B. & E,S. Personnel management. J,. E. WALThaa. Factory Woee-rment fi* Maintenance, 94 [12] S333--W (1936).-- The topics considered are (1) personnel management costs. selection of employee*. (3) personnel maintenance. (4) training and education. (5) medical and health service, (0) -afwy and accident prevention, and (7) personnel service *<*h. Figures, tables,'and photograph* are included. J.L.G. Significance of free aystailine silica ltt Che etiology of Ptosis and silieotuherculosts. K. W. Jftrra.v and H. P"VRr.sa. Mid. HVff., io, 345-39 (1936); abstracted m Jour. I,,d. Hyt- 6* Toxicol., 18 [8] 130-31 (IfWtl).--The uthor* duMi-d rabbits over a period of four years, first 2, bra 3. then tt hr. daily, with porcelain dust having 30% 'r* silica ami 1 to 2% sericite After this period the ani mals showed no typical silicosis although there could be seen sharp, pinpoint-slxed, subpleural foci and a >tight in crease of fibrosis. During the dusting, tubercle bacilli were administered intravenously. These grew slowly, and with indurating processes, into a pulmonary tuberculosis while the controls showed no noteworthy disposition to contract tuberculosis. It is concluded that over a 3 to 4 year period of dusting with tubercle bacilli injected, U mi possible to produce a tuberculosiUcosis, although with the dust alone tt was not possible to show silicosis, in spite of the presence of sericlt*. By dusting with pure quartz (without tuberculosis infection and without seriate) for 1 hr. daily for 2 years, typical silicotic nodules were pro duced. E.J.V. SiUcit* analysis in industrial dusts. F. Saatoann and X. W. JOttsk. Zenit. Gcwcrbtkyt. dr ZJafaUaerluU., 21, 65--69 (1934),--Materials studied were from the Rhine Steel Works, the Thyssen. and the U. S. Steel Co. Tables show in detail the procedure and results, accompanied by ample comment and description of methods involved, tl dusty occupations are to be graded on a danger scale over long or short periods, the sickness percentages and dust analyses must be carefully compared. These new re search methods are concerned with the sixe of grains in dust raised and the accurate preparation of undissolved add panicles, thus serving the combined purposes of mechanical phase analysis and chemical analysis. Impor tant Insight into the structure of different kinds of dust has been gamed, and this has been increased by using definite purity texts, the tetralin method. KLR. Silicosis: harmful dusts which cause It, W. R. Jones. TVarw. Ceram. Soc., 34, 303-13 (1935); see Ceram, Abi., 14 [3] 84 (193A). Silicosis in the porcelain industry from the standpoint of the physician. Scbilssahat. Ber. Devi. Keram. Get., 17 re] 322-30 (1936).--It is pointed out that a sili cotic lung rarely occur* by itself, being usually associated with tuberculosis. A description of a silicotic lung is given. S. outlines Che two theories of silicosis, mechanical and chemical, and discus'** the chemical aspect of the problem. E.J.V. Training your own instrument men. Altud G. Moos. Instruments, 10 [1] 15-18 (1937).--M. reviews basic con siderations, qualifications of candidates, training of instrument men, division off time between various types-of repair jobs, supplementary educational work, progress re ports. and rating gride to be used in semiannual check up. R.W.R. homes and uvULhvtns Determination and Control of Industrial Dost. J. J. BbOourticLU Axn J. M. Dau.avau.z. * 5. Pub. Health Bull., NV 217. 167 pp. (April, 1935).--This brief but com prehensive work presents "the methods and instruments used in conducting dust studies in industry, the interpre tation of results thus obtained, and their practical applica tion co industrial problems, especially those phases relating to control of the dust hazard." preliminary procedure involves the sanitary and occupational survey of a plant; final emphasis b placed on personal respiratory protection of worker*. Between the*e occurs the dust technique. y ./ UH Centtnic Abstracts VoL III, No. "i increasingly large verdicts. The Workmen's Comperi**- tion Act rim applied only to accidental injuries. Occu- pacional diseases should be compensated under an sf* rosgemeat similar to workmen's compensation but sepa rately, because there is so much difference between them. Partial disability should be compensated. It is difficult to obtain unbiased and expert medical diagnosis of silicosis and the degree of disability- There should be a special medical board in each state fur such a diagnosis. Preven tion is more important than compensation and much cheaper. W.D.F. Mineral materials which produce silicosis. 3. Goss- jeea. Sprtcktaal. 69 {4lj H01-W2; [421 <U-17 (IKW).-- Lung diseases occurring in the porcelain industry are not produced by sendee or other minerals containing mica, as it is sot present in the dusc and mica is not contained by the siliceous materials used. This fact shows that lung diseases are not connected with the presence of mica. The appearance of silicosis is chieriy due to the presence of free silica in the siliceous rocks used. M.V.C Protection of health of glass and ceramic workers. T- Thomas. Clash'd!*. 66 [49 J 325-2)1 (19.1)1).--Measures to be taken tn the case of various injuries sustained by workmen are discussed. M.V.C. Ratine and performance of stationary steam boilers. W. S. Patti*soJf. Combustion, 8 [2| 21-30 (19.11!).--The absurdity of the terms "boiler hone power" and "per cent of rating" as applied to modern steam generating units is discussed, and more rational expressions are suggested. The effect of variable entering gas temperature, operating pressure, and superheat on the boiler performance is an alyzed and illustrated by curves and equations. Gas- temperature gradient and draft toss through boilers are also discussed. H.E.5. Report of the Committee on Ceramic Education for 193d. Harold E. Whit*. Bull. Amtr. Ctram. Sac.. Id [3| 111--20 (1937).--This report includes tabular data compiled by E- E. Marbaker and E. H. Fritz. Suggestions' for starting and maintaining a foundry apprenticeship system. J. E. Goss. Trans. Amtr. Foundrymm's Assn.. 7 (2) 323-30 (1933).--G. outlines points to be taken into consideration in-apprentice train ing. such as methods of selection, testing prospects, age limits, 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. honk has complete information conoertiiiiff the varimn chemical constants and characteristics ami properties ( most organic and inorganic elements anil compounds, tn addition, various qualitative and quantitative de termination procedures are given both for organic and inorganic substances. M.C.jshaw national Physical Laboratory Collected Researches: VoL XXV, 1933. K. M. Stationery Office. London. 412 pp. Price 1 3s. 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-Zn. Ag-Sn. and Ag-Kg, metallic cadmium, and the crystal structure of a- and 1-manganese. One paper U devoted to special refractories for metallur gical research. A brief resume is given of the properties and methods of producing refractory crucibles, muiiles. and tubes from silica, alumina, magnesia, thoria, alumina-clay, and silicon carbide-clay. M.C.Sha*' Official Year-Book of the Scientific and Learned Societies of Great Britain and Ireland; Record of Pub lications Issued during the Session 1935-1934. Com piled from Official Sources. 53rd annual issue. Charles Griffin and Co., Ltd., London. Wild, vii -4* 170 pp. Price IDs net. Moted in Xatort, 139 [13iJ(i| .51 (1917). J-L.G. Third Ordinance Increasing Compensation of Occupa- y tional Diseases in Germany. M. Balts. Reprint from Reichsarbeitiblatt, Md. 38. Part IV (1938). 47 pp. Berlin. 1937. The new ordinance relating to occupational diseases in Germany went into effect April 1. 1936, superseding the Second Ordinance of Feb. 11, 1929. Several industries are added to the list of compensable diseases, including all the ceramic industries (previously only the porcelain industry was insured), sandblasting, and operations for cleaning castings and molds. Asbestosis in the asbestos trades and lung caocer in the chromium industries become compen sable. Severe silicosis, compensable under the Second Ordinance, is still the only form of silicosis insured against, but what constitutes the disease for clinical, rdntgenolog- ical. and 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 damageclahns -reported -for occupational diseases since 1929, silicosis has stood at the peak; in 1934, of 1043 cases, 522 were for silicosis; in 1935. of 1161 cases, 627 were for silicons, with 146 death) tn 1935 from this cause. K.R. SOOCS A.V0 SLIXtTtHS Bureau of Mines activities in the field of building materials. D. M. BaMM. t". S. Bar. Miner [nfarmaiion Ci'e.. Mo. 6924, 51 pp. Free. B. collates all publications by members of the B ureau personnel on the subject of build ing materials and includes reports published by the Govern ment Printing Office and mimeographed by the Bureau and articles in technical journals and cooperative reports. - R. A. Hsindl Chemist's Year Book. Edited by E. Hoes. Sberratt fit Hughes, Manchester; Chemical Publishing Co.. Mew York. 1936. 13th ed. Price W.OO. 1257 pp. The hand- - jotnuvAt. Siaab (Gust). Edited by C. L-Ihiiekt. VoL l. Mo. 1. V April, 1936. Published quarterly by Wilhelm Knapp- Halle. Price 5 Rm. The Association of German In dustrial Insurance Societies reports on the current status of the dust-conirot campaign and surveys the literature- Two or three original research papers comprise the first part of each issue, fallowed by reviews of pertinent litera ture arranged systematically under (1) dust research into properties, estimation, and measurement, (2) dust sources- (3) dust diseases, (4) other dust injuries". (5) preventive methods, snd (6) laws and decisions. KR