Document 99YagodqeLejjxyG2Xxq2eGB7

FILE NAME Brakes BRK DATE 1941 Apr DOC BRK010 DOCUMENT DESCRIPTION Journal Article - Dust Hazards and Their Effects 76 JOURNAL OF INDUSTRIAL HYGIENE AND TOXICOLOGY vol 23 no 4 shops are some of the typical results avoid such hazardous conditions To the chemical aid is offered and enclosed with the letter is a list of articles from the . Division of Industrial Hygiene writes letters Division dealing with industrial hazards to all plants in the State receiving defense contracts Medical engineering and Plants are visited to discover possible dangerous conditions Lawson DUST HAZARDS AND THEIR EFFECTS THE SILICOTIC NODULE IN HUMAN AND EXPERIMENTAL SILICOSIS A COMPARATIVE STUDY T. H. Belt A. A. Ferris and grindstone dust no silicotic changes were produced only slight connective tissue and capillary proliferation Teleky E. J. King J. Path and Bacteriol - vol 51 pp 263-267 Sept. 1940 PREVENTION OF SILICOSIS BY METALLIC The authors report on a comparative . study of silicotic lesions in man and those ALUMINUM Jotten Arbeitsschutz pp produced rats after a single tracheal from 252-254 1940 The author reports results of his experi- injection of silicon dioxide ranging ments on animals in which he used quartz 0.8 to 5. They stress the zone of fibrous with tissue practically no silica particles with 0.75 aluminum The Canadian workers now employ greater amounts of was redundant fibrous encapsulation as an aluminum Dust inhaled by rabbits important difference between silicosis as for 6 hrs daily and more or less typical experimental seen in man and that in animals where they found such was lacking silicotic changes were found in animals They also point out some differences in the surviving for a year The positive findings occurred earlier than in the control animals character of the fibers and their pattern - They speculate as to the possibility that in although the daily period of exposure was man the lesion may be complicated by shorter ?? The author mentions briefly that he experimented with 25 and % infection Evidence as to the development mixtures of aluminum silicate and found of the redundant capsule with an outer this material to diminish remarkably the halo of dust is not submitted in this report A subsequent report is promised and this effect of the quartz Teleky . point may then be clarified Z. Schulz INVESTIGATIONS COMPARING THE DANGER TO THE LUNGS FROM NATURAL AND ARTI- FICIAL GRINDSTONES IN GRINDING SHOPS _ G^/rtner Arbeitsschutz PP _ 245-248 - 1940 There is a short report of investigations made by J^ttenin order to give an expert opinion by order of the German ministry of labor The complete report will appear as number 15 of Arbeitsmedizin pub- lished by I. A. Barth Leipzig Experiments were made in which rabbits inhaled dust produced by crushing two natural grindstones and two artificial ones Of the latter one was compounded of minerals the other of ceramic compounds containing 25 insoluble silicic acid The dust of natural grindstones containing 93.2 and 74.2 quartz produced in the rabbits typical sil^>coticnodules With the artificial SILICOSIS FROM PORPHYRY WITH A NOTE ON ACUTE SILICOSIS Symanski Arbeits- schutz pp 272 2741940 Porphyry contains from 30 to 50 free silica The author saw a man who had worked for 7 years as a quarryman but was endangered only during his 9 months experience as a driller He acquired a serious silicosis 20 additional cases of silicosis from porphyry were seen most of slight or medium degree Teleky ASBESTOSIS BRAKE IN GRINDERS AND DRILLERS OF BANDS Brachmann Arbeits- schutz pp 172 1741940 Since 1937 workers in all asbestos manu- facturing plants must be examined annually by the medical factory inspector in Saxony The brakebands are made of sheets of asbestos or are pressed out of asbestos Apr. 1941 waste products and a fill artificial resin Afterwa plates are ground and and roentgen examinatio and drillers and w men pieces showed a few light after they had worked 2 asbestosis are found in after 5 yrs employment DUST SMOKE FUM NOTES ON THE HOW TI MICROESTIMATION Wilkinson and C. G tralian J. Exp Biol an pp 341-342 Dec. 1941 The authors suggest : in preparing reagents ar technic Ind & Eng Cl 226 1938 to eliminate c encountered The H modification of Gutze were able to reproduc amounts of arsenic a -B D. Tebbens ESTIMATION OF HALOGE VAPORS IN AIR S. 1 Burke Y. Dept. - vol 19 p 232 Dec. 18 The authors have me described by Tebbens 1937 The 9 x 11 : rheostat absorbedrr meter with space for It is operated at 0.75 1 claim that they obtain efficiency for chlorina carbons but only 80-8 naphthalene Sampli to 1 hr depending up expected Lau DETERMINATION OF HEMOGLOBIN IN THI THE PHOTOELECTRI Havemann Klin pp 1188-1185 1940 A method is descri a short time The imeter used was cons and is made by W. Dahlem 1 cc of bl Apr. 1941 ABSTRACTS 77 waste products and a filler impregnated by artificial resin Afterwards the bands and plates are ground and drilled Clinical and roentgen examination of the grinders and drillers and men who file individual pieces showed a few light cases of asbestosis after they had worked 2 yrs Such cases of asbestosis are found in nearly all workers after 5 yrs employment Teleky THE STRUGGLE AGAINST ASBESTOSIS TODAY Ehrhardt Arbeitsschutz PP 191-193 1940 A short description of asbestosis not the struggle to prevent it which is a technical not a medical problem The only unusual statement in the paper is that no relation- ship between the nasal dust filtering ability and degree of asbestosis was found Teleky DUST SMOKE FUMES AND VAPORS DETERMINATION AND ELIMINATION NOTES ON THE HOW MICROESTIMATION TECHNIQUE FOR THE OF ARSENIC T. as 0.1 cc is necessary to 0.5 Teleky The error is said Wilkinson and C. G. Greenham Aus- tralian J. Exp Biol and Med Sci vol 18 DUST IN THE STONE AND EARTH INDUSTRY Arbeitsschutz pp 226 2219 940 pp 341-342 Dec. 1940 The authors suggest slight modifications in preparing reagents and in using the How technic Ind & Eng Chem Anal Ed 10 226 1938 to eliminate difficulties they have encountered The How technic is a modification of Gutzeit's method They were able to reproduce observations with amounts of arsenic as low as 0.1 gm A short review of the importance of the dust problem in the ceramic industry is presented and is followed by a report by Hass on the technical aspect of the problem especially regarding dust sampling and counting He mentions only a gravimetric procedure the konimeter and tyndallmeter cleaners Use of portable vacuum is recom- mended for keeping workshops clean H. -B D. Tebbens Buckup in reporting on medical aspects of ESTIMATION OF HALOGENATED HYDROCARBON VAPORS IN AIR S. Moskowitz W. J. Burke N. Dept. Labor Indust Bull vol p 232 Dec. 1940 : The authors have modified the apparatus described by Tebbens THIS J. 19 204 1937 The 9 x 11 x 19 box contains a rheostat absorber drying tube and flowmeter with space for a combustion tube It is operated at 0.75 1.p.m. and the authors | claim that they obtain approximately 100 efficiency for chlorinated aliphatic hydro- the problem said that the Saxon ministry of labor had installed an ray car with which 13,428 examinations have been made in 9 months This apparatus employs a screen method which is cheap but gives only small pictures in which the first stage silicosis cannot always be positively diagnosed and beginning silicosis can not be detected In this way it was found that in one factory 12.6 of the workers suffered from silicosis 1.6 serious 4.2 medium In a clay pit 12.2 were found to be sili- cotic Teleky carbons but only 80-85 for alpha chlor- RAY EXAMINATION OF THE STRUCTURE OF . naphthalene Sampling time is 10 min ~ INDUSTRIAL DUST AS A METHOD OF MEDICAL to 1 hr depending upon the concentration EXAMINATION G^/rtner Arbeitsschutz expected Lawson pp 193 1915 940 . The author presents a short description DETERMINATION OF CARBON MONOXIDE HEMOGLOBIN IN THE BLOOD BY MEANS OF THE PHOTOELECTRIC COLORIMETER R. - Havemann Klin Wchnschr vol 19 a pp 1188 11815 940 A method is described which takes only a short time The photoelectric color- imeter used was constructed by the author and is made by W. Kauhausen BerlinDahlem 1 cc of blood or even as little of the method as employed in examining airborne dust and dust in the lung It is remarkable that the author found no quartz in silicotic lungs of china workers who used kaolin and sillimanite He concludes that these substances are also able to pro- duce silicosis and he adds that we now know that other silicates such as asbestos produce silicosis See these abstracts 21 199 1939 Teleky