Document OzZwK2R6Z9Vr1D664knppdq2L

The American Ceramic Society PLAINTIFF'S j EXHIBIT 1 tyi\ifl~i.oo 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. Christine Schnitzer Product Manager Ceramic Information Center 735 Ceramic Place Westerville, Ohio 43081-8720 614 890 4700 TWX: 7101109409 CERAMIC ABSTRACTS Compiled by The American Ceramic Society Ross C. Fvuy, Editor Mary J. Radcuffk Ejoly C. Van Schoics Dorothy J. Turn** 1 Assistants Committer on Publications: J. D. Sullivan, Chairmen. E. os F. Curtis, R. F. Sherwood, W. W. Winskif, R. C Purdy Volume 16,1937 Abstracters: J. B. Austin, A. A. Ayars. Rudolf Barts, A. C. Bevan. Devida* Biswas, L. T. Brownmiller, W. H. Bruckner. P. P. Budnikoff and E. Stefanowsky. J. C. Chaston, R". M. Cohn. M. V. Condoide. Maurice Delangre. R. Rr. Devil]ers. A. H. Emery, W. F. Figee. R*. D. Foster. J. L. Gallup. J. D. Gat, P. E. Grotts. Max Hartenheim, F. G. Heck. R. A. Heindl. E. B. Hewitt. J. X. Hill. G. M. Hutt, J. F. Hyde, Herbert Insley, C. B. Jenni, B. Z. Kamich, B. E. Kinkulkin. Seiji Kondo. E. H. McClelland. F. P. Peters. G. M. Petersen. C. J. Phillips. J. G. Phillips. R. H. H. Pierce. Jr., Alexis Pincus. Katherine Reed, H. K. Richardson. A. B. Searle. Stanford Setchell. M. C. Shaw, G. R. Shelton. H. E. Simpson, A. P. Som, Erich Stenzel, H. H. Stephen* son. A. G. Stern. B. H. Strom, L. E. Thiess. E. J. Vachuska.F. E. Vaerewyck, F. J. Zvanut. Editorial Office: 2525 North High Street. Columbus, Ohio. Publication Office: 20th and Northampton Streets, Easton. Pa. . 1G. No.*] 1937 Chemistry and Physics--General 137 rdroxyquia& Koram. Ctt, determiniai implified da. detail. S e:;.v. ia days a rrz. Zavoi. \B. & E.S.' f xlnminm^ Jour. Si. ); R-P. 957. re convene* Thes* w*r oxide. AliOt value for tlx 0.002. * R-A.H.; eat. H. L 935); CAei. j-jve been plotted in a ternary diagram. These results ihow that the pigments of the best hiding powers were pre- parcd from solutions with a titanium dioxide concentration falling between 13 and 19% and ratios ranging from 1/1 :o 1/0.65. Seeding opalescence occurs at different bydro- joj.ion concentrations with different concentrations of jolutions. Illustrated. F.G.H. Viscosity end plasticity of disperse systems: VI, Ef fect of temperature and electrolytes on the plastic proper ties of kaolin. M. P. Wolaxowttscb and D. M. Tol stoi. KoUoid-Z.. 73 [11 92-96 (1935); see Oram. Ais.. 16 [31101 (1937). VII, Plastic flow in an apparatus with cylinders displaceable lengthwise. D.'M. Tolstoi. Kol- ltnd-Z., 73 [ 11 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 cylinders. Results agreed well with those obtained by the rotating cylinder method of Wolarowitsch. At very small velocities, Bingham's equation for plastic flow does not hold for high concentration mineral suspensions. For Parts I-V see Ceram. Abs.. 13 [71 222 (1936). FJ.P. MTIMTI Alkali silicate. Anders E. A. Cornelius (Helios Kemisk-Teloiiska Fabriker A.-B.). Swed. 80.000. April 4. 1934. Gum. Abs., 29, 6000 (1935).--Steam is blown into an electrically heated bath of alkali silicate formed by the reaction of alkali chloride and SiOr. During the process the bath is kept covered by a layer of the unmelted charge of alkali chloride and SiOj. with or without another substance, i f., lime, for the formation of double silicates. Method of manufacture of precipitated tine oxide. G. Antonoff. Brit. 459.238. Jan. 20, 1937 (June 5, 1935). Production of a calcium aluminate suitable for the manufacture of sodium aluminate by treatment with soda lye. Akttesblskafet Norsk Aluminium Co. Brit. 457,676. Dec. 16. 1936 (Aug. 30. 1934). oxidizing ac 4 of SeOi in General nature of tb at SeOi pro reference!. , j imVnel silicosis. H. Siegmund. Verhandl. Dcut. Path. Gts.. pp. 262-71 (1934); Oum. Abs., 29, 8169 d. Chazib ; 1935). [5] 299-309 J Causation of pneuaonoconioses. Pinup Drinker. residue afts hut. Ind. Hyt. 6f Toxicol.. 18 [8] 524-36 (1936).--The -lidc acid fa various pnetimonoconioses and their causative agents are lsolubility d discussed. Silicosis and asbestosis are definite diseases; .uartz ground is anthraco-silicosis and various silicatoses, modifications ain-size frao of normal lung conditions are seen. Effects of carbon or .ion of hydro hr. Result! t fairly gree carbonates, gypsum, and iron oxides are also discussed. Methods of estimating dust exposures of a workman in clude the taking of dust samples from the work place and .ed, all of tit ic.etpreiing the results during the man's total period of The rate a'J exposure. Errors made from estimating the composition rease in giah of dust from samples which have settled upon rafters in- E.J.V. stead of using samples taken from the air are emphasized. rauiEX. i Permissible dust concentrations need, not exceed 50 million is.. 29, 71B particles per cn. ft. for dust with very low quartz content 167(1935). ; or 5 million for pure quartz. In defense of the use of 5de with sd- standards of dustiness, the experience ia S. Africa where ampt. Keni. cust standards have been applied successfully for many which estah Tears is cited. E.J.V. r Se, and U' Charles IT. Brady. Anon. Butt. Antcr. Ceram. Soc., nstants wet1 19 T2I 73-74 (1937). M.H. | V Chemical considerations on some pneumoconioses affecting pt Work. hi (eathracosis, silicosis): I, Nature of the problem. Rest Caere. Conir. Chim. Ind., 14tk Congress, Paris, 5 pp. fate solution 1934); Oem. A5s., 29, 5774 (1935). ric anhydrid y Clinical aspects, disgnosis, and tresbnent of pneumo cial titaniuff coniosis. W. Irving Clark. Jour. Ind. Zfyg. Gr ion srtth scrj `oricol., 18 [8] 537--49 (1936).--Pneumonoconiosis is a with orthodj disease resulting from the inhalation of inorganic dust. ectively, lA The two pneuraonoconioses which produce disability are f good hidid silicosis and asbestosis. The pathology of silicosis is char* asic titaoiua acterixed by the presence of fibrotic nodules scattered ecd nuclei. * | |drough both lungs, and that of asbestosis is characterized ies or hidid | >` *n interstitial fibrosis involving the lower half of both j;. omposition J1--*J- The symptoms of silicosis and asbestosis are simi- ydride-wactf j the most important being dyspnea. The most com- Hon complication is pulmonary tuberculosis wbicb. m silicosis, is a frequent cause of death. The diagnosis of both silicosis and asbestosis is made largely by a correla tion of history and symptoms with the X-ray examination. The treatment of pneumonoconiosis is preventive sad symptomatic. The course of silicosis and of asbestosis is 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. E.J.V. Clinical hematological studies for the differential di agnosis of industrial silicosis. C. Schlomka and F. A. Nolte. Klin. Wachichr., 14,9S7-92 (1935).--The authors have experimented with the pathological-anatomical 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, ROntgen 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 RSntgenotogical 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 shown in stone dust patients. This shows clearly 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 lemkocytes in a streak prepara tion. The same symptoms, even if less impressive, are 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. 13S Ceramic Abstracts Vol. hi. No, C. W. Pla.yje. Jnus. Amer. Ceram. See., 20 [31 90-9(1 (1937). Diagnosis of silicosis. Emeey R. Haykuxst. Amer. Labor Let. Rev.. 26, 51-66 (193(1): Abstracted is Jour. Ltd. H?f. 6r Toxicol.. 13 [S| 131-32 (1936).--Factors necessary to diagnose chronic silicosis are: (1) exposure to silica dust in sufficient quantity for 3 to 20 years; (2) 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. (S) Physical examination: no char acteristic but some suggestive findinp. (7) The pa tient's complaints: these are 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. Waucek. EUc. Rev., 119 [3082| 833 (1936).--W. discusses the conditions which govern the design of economizers and air preheaters for use with boilers. . J.L.C. Epidemiological aspects of silicosis and tuberculosis. Altox S. Pops axd David Zacxs. Amer. Rea. Tuberculo sis. 32, 229-12 (1933); Cum. Abs.. 29, 7321 (1935).--In representative groups of both granite and foundry workers in Massachusetts, the frequency of silicosis and of silicosis and tuberculosis was correlated with the duration of ex posure to dusts containing free silica and to the concentra tion of such dusts in the occupational environment. Among granite workers silicosis was found in 15.2% and with tuberculosis in 7.8%. Tubercutosis is the cause of death in over one-third of all gTanite workers, a propor tionate mortality 3 times that in foundry workers and 1 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 2.8%, 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 one-fourth of all the deaths of foundrymen, is the greatest occupational hazard.in the industry. Industrial health hazards and employer responsibility. W. J. McCoxxvll. Trans. Amer. Foundrymen's Assn.. 7 [11 161-65 (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. Cusooxcs. Ibid., 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 chat 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 contract 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 exhibic evidence of concurrent pulmona.-r infection or injury. It is the executive's responsibili:? to inform himself on dust hazards, conduct surveys of i-, plant, and inaugurate a program of control. Prospective employees are grouped into three general groups; tho< which are fair risks and those which should not be employe- are indicated. C. recommends that an educational pro- gram similar to that used in "Safety First" campaigns <: inaugurated to combat the dust hazard. Discussion Avsy et al. Ibid., pp. 180-90.--The various ways of pr. venting illness are pointed out. and precautionary measurti taken in the foundry are outlined. H.E.3. Industrial pulmonary disease due to inhalation of dust with special reference to silicosis. E. L. Middleton MUroy Lectures. 1936. Lancet, pp. 1-9 (July 4); pp. .'.i. 64 (July 11. 1936); abstracted in Jour. hid. Hyg. a Vari ed., 18 [S| 129-30 (1936).--The first lecture is devoted silicosis, as being the most important of the pneumonocc- nioses. Particular attention is directed to the occurred: of the disease according to occupation. During 1930 1934. at least 1521 deaths occurred in England and IValei. of these. 372 were caused in the sandstone industry, a:: 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 diseaK is always originated by the dust of fine particles of frti silica; the way in which this risk is present in a number ri industries is explained. Sandblasting and the manufac ture of abrasive soaps receive special note, as in both thi hazard is so intensive that the onset of the disrase is un usually quick and its course rapid; thus only 3 or 4 yean 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 icseii is not a dangerous dust; apparently the disease is origi nated by dust arising from the rocks among which silica found or from impurities in the coaL Out of 169 deaths " all coal fields in Great Britain. 147 came from S. Wale this undue proportion has not yet been explained. Tit picture, both clinical and histological, becomes modifier when silica is mixed with other forms of dust; when coal i.- associated in the dust, the condition is known as anthracc- sis; here the fibrous tissue entangles the coal dust and re tains it to help in blocking up the lymphatics. In & second lecture the influence of the dust of silicates. of chemically combined silica, is considered. Of thes*- asbestosis stands out as most toxic; the particles consist:: fragments of fibers, some 3 microns long and V micron - diameter. They originate pulmonary fibrosis which - more generalized and less nodular than that of silicoi- the condition develops quicker than silicosis, but the tes- deucy to succumb to superimposed tuberculosis is act - pronounced. Other dusts considered are those of si--' manite, china clay, talc, mica, and sendee; none of tb*5 approach asbestos and silica in their dangerous quali(-e The harmful nature of any dust may be tested by notis* the reactions which follow when it has been either iajec:f- subcutaneously or administered by the tracheal tot-- suspended in fiuid; injection into the peritoneal cav-- may also be employed. The theory adopted is that dcJ- exert their harmful influence by reacting chemically 10; No. { General 13tt feneraOj ntimonar) possibility eeys of ^ respects, tps; tbo^ -oopioytj :wnal pn. npaifHs^ Xwani^ T of prtymeasuna H.EB. oa of dn^ ItDOLXTOR 0; pp- 59- T of Tom. devoted ti '.euntoson occurreao as 1930 it sad Wiles; lnstry, tad tare of patminers, nThe .da of fnt i numbered e manufacis both tie 3 or 4 yesa . instead cf The occorce coal itsd tie is oriphich silica i >9 deaths at n S. Wala; lined. The :es modifies when coal s' asanthrae* dust tad re ies. In tbt ihcates, . Of these !es consist d ' micron is `is which s of silicosis: but the tensis is not a rose of stDi* lone of thes us qualities, ed by notisl iher injected .icheal route oneal cavit? is that duse tnically with ,j,, tissues of the lungs. the life and structure of which are thereby modified. Each form of dust stimulates a special ftsCtitra of its own. while mixed dusts set up a mixed re action- No evidence is put forward that dusts other than -hose of silica or silicates are harmful, or that any dust is -apable of reducing the toxic influence of anv ocher. i E.J.V. fcseestigttioaa on quartz and sencite analysis of indusgjal dusts. P. Sartorivs jure K. W. JOttsn. Arch, ffjg. fi* Bahteriol., 115, 135-51 (1935); abstracted in Jour. Ird.Eyt- S' Toxicol., 18 [4J 54 (1936).--The separation of tanous mineral constituents of dusts by the use of liquids taring suitable specific gravities is discussed. The stand ard methods of mineralogical and chemical analysis of justs are mentioned, with a description of the X-ray eximitation. Some of the common minerals are shown. Mention is made of the mineralogy of sericite. E.J.V. Hethods of dust concroL J. D. Lbitch. Tram. Amcr. [ Foundrymen's Asm.. 7 [1] 209-21 (1936).--The point to begin elimination of the dust hazard is at the vjurce. Methods used for controlling the dust hazards originating 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 system is best deter mined! by dust counts. Methods used for testing ven tilating equipment and the selection of fans are presented. Pun collectors and respirators, such as helmets, filtertype respirators, and positive-pressure masks, are dis cussed. 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.S. Molding of clay after heating at various temperatures. R. Morettt. Corriere Ceram., 15, 221-23 (1934): Chfm. Jrrtr., 1934, ii, 3296; Brit. Chem. Ahs.-B. 54 (27) 591 1935).--Heating at 100 to 500* before molding increases :he apparent porosicy of the product fired at PCX'* and de-Teases the resistance to breaking of a specimen dried at :2"*. ffomograph for cermmie calculations. A. A. Gnscrssil. "tirupory. J (5J 374-76 (1935).--The nomograph facili tates the chemical analyses and the calculation of the mount of oxides in the fired product and of the raw rna`Ttfcl required for a given quantity of the Utter. | P.B. & E.S. Personnel management. J.. E. Waltzas. Factory Management o' Maintenance, 94 (12] S333-44 (1936).-- The topics considered are (1) personnel management costs. selection of employees. (3) personnel maintenance. (41 training and education. (5) medical and health service. (6) ^etr end accident prevention, and (7) personnel service *rk. Figures, tables, and photographs are included. J.L.G. Significance of free crystalline silica in the etiology of tdicosis and silicotuberculosis. K. W. JOttex and H. ^'i-stxr.Ea. Med. Writ.. 10, 545-50 (1936); abstracted Jour. Tnd. Hyt. 6* Toxicol.. 18 [81 130-31 (1936).--The *u:hbrs dusted rabbits over a period of four years, first 2. ten 3. then t* hr. daily, with porcelain dust having 30% lrT silica and I to 2% sericite After this period the ani mals showed no typical silicosis although there could be seen sharp, pinpoint-sized, subpleural foci and a slight 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, it was possible to produce a tuberculosilicosis, although with the dust alone it was not possible to show silicosis, in spite of the presence of sericite. By dusting with pure quartz (without tuberculosis injection and without seriate) for 1 hr. daily for 2 years, typical silicotic nodules were pro duced. E.J.V. SQlcata analysis in industrial dusts. F. Sartowus atea K. W. JdTTKX. Zentr. Geverbehyg. 6* Unfalherhut.. 21, 65-69 (1934).--Materials studied were from the Rhine Steel Works, the Thyssen, and the V. S. Steel Co. Tables show in detail the procedure and results, accompanied by ample comment and description of methods involved. If 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 size of grains in dust raised and the accurate preparation of undissolved add particles, 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 gained, and this has been increased by using definite purity tests. *.{.. the tetralin method. ICR. Silicosis: harmful dusts which cause it. W. R. Jones. Trans. Ceram. Soe.. 34, 303-43 (1935); see Oom. Air.. 14 [3] 84 (1935). Silicosis in the porcelain industry from the standpoint of the physician. Schilffahrt. Ber. Deni. Keram. Get., 17 (6( 322-30 (1936).--It is pointed out that a sili cotic lung rarely occurs by itself, being usually assodated with tuberculosis. A description of a silicotic lung is given. S. outlines the two theories of silicosis, mechanical and chemical, and discuses the chemical aspect of the problem. E.J.V. Training your own Instrument men. Alfred G. Moon. Instruments. 10 [1] 15-18 (1937).--M. reviews basic con siderations. qualifications of candidates, training of instrument men. division of time between various types of repair jobs, supplementary educational work, progress re ports. and rating guide to he used in semiannual check up. R.W.R. KOOKS A.VD IlfLLeTtN.x Determination and Control of Industrial Dust. J. J. Bloomfield and J. M. Dallavallx. t* 5. Pub. Health Bull.. No. 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 to 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 is placed on personal respiratory protection of workers. Between thee occurs the dust technique. y S llH Ctramie Abstracts Vol. Hi. No. -*> increasingly- large verdict*. The Workmen's Coni|icn*a- tion Act lint applied only to accidental injuries. Occu pational diseases should be compensated under an ar rangement 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 for such a diagnosis. Preven tion is more important than compensation and much cheaper. W.D.F. Mineral materials which produce silicosis. B. Goss- Nta. SprtcJuaai, 69 (4l| 601-6U2; (42| 616-17 (litHi).-- Lung diseases occurring in the porcelain industry are noc produced by sericite or other minerals containing mica, as it is noc present in the dust and mica is noc 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 chiefly 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. Clashiius. 66 (491 $25-26 (193(5).--Measures to be taken in the case of various injuries sustained by workmen are discussed. M.V.C. Rating and performance of stationary steam boilers. W. & Pattsmom. Combustion, 8 [2| 23-30 (1936).--The absurdity of the terms "boiler horse power" and "per cent of rating" as applied to modem 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.S. Report of the Committee on Ceramic Education for 1936. Harold E. White. Bull. Amer. Ctram. Soc., 16 [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. Foundrymtn's Assn., 7 [2] 323-60 (1936).--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. H.E.S. h>tk has complete information concerning the varimi* chemical constant* and characteristics ami properties of most organic and inorganic elements ami compounds. In 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 XZ7,1935. K. 51. Stationery Office. London. 432 pp. Price El 5s. 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-Hg. metallic cadmium, and the crystal structure of a- and J-manganese. One paper is devoted to special refractories for metallur gical research. A brief resume is given of the properties and methods of producing refractory crucibles, murtles. and tubes from silica, alumina, magnesia, thoria, alumina-clay, and silicon carbide-clay. M.C.Skaw Official Year-Book of the Scientific and Learned Societies of Great Britain and Ireland; Record of Pub lications Issued during the Session 1933-1936. Com piled from Official Sources. 53rd annual issue. Charles Griffin and Co., Ltd.. London. 1936. vii 4- 170 pp. Price 10s net. Noted in Xature. 139 (35061 51 (1937). J.L.G. Third Ordinance Increasing Compensation of Occupa tional Diseases in Germany. 51. Bauer. Reprint from ReichsarbtitsblaU, N6. 36, Part IV (1936). 47 pp. Berlin. 1937. The new ordinance relating to occupational diseases in Germany went into effect April 1, 1936, superseding the Second Ordinance of Peb. 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 cancer in che chromium industries become compen sable. Severe silicosis, compensable under the Second Ordinance, is still the only form of silicosis insured agairtsc. but what constitutes the disease for clinical, rdntgenolog- teal, 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 damage claims 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 silicosis, with 14G deaths in 1935 from this cause. K R. BOO S3 AND BULLETINS Bureau of Mines activities in the field of building materials. D. M. Banks. L\ S. Bur. Hints Information Circ.. No. 6924, 51 pp. Free. B. collates all publications by members of the Bureau personnel on the subject of build ing materials and includes reports published by the Govern ment Printing Office and mimeographed by the Bureau and articles in technical journals and cooperative reports. R. A. Hslvol Chemist's Year Book. Edited by E. Hoes. Sherratt 5c Hughes, Manchester; Chemical Publishing Co., New York. 1936. ISth ed. Price 56.00. 1257 pp. The hand- NEW JOURNAL Staub (Dust). Edited by C. Ummert. Vol. 1. No. L. J April, 1936. Published quarterly by Wilhelm Knapp- Halle. Price 3 Rm. The Association at German in dustrial Insurance Societies reports on the current stacai of the dust-control compaign and surveys the literature- Two or three original research papers comprise the firs' part of each issue, followed by reviews of pertinent litera ture arranged systematically under (1) dust research in'0 properties, estimation, and measurement. (2) dust sources. (3) dust diseases, (4) other dust injuries", (5) preventive^ methods, and (6) laws and decisions. KR