Document a1vVrZmV0qj0RVRDgXYa3eQVa

m S=3 --^ Digest of Industrial Hygiene . 26. 523 Watch Mercury. Anonymous. Safety Zng.., 81, 10-12 (February, 1941). The easy evaporation of asrcuzy contributes greatly to its high place aaong hazardous substances. For that reason good housekeeping and mechanical vontile tion aro necossary in all pieces shore it is used. Workers on equipment used i connection with mercury should soar a positive air line respirator or a gas mas The absorption of 1 mg. of mercury daily over an oztondod period may cause poi soning. In the absence of definite information on safo limits. 6 to 15 parts o mercury per 100 million parts of air may bo considered a safe concentration of fumes, based on steady work and a forty hour week. Preventive recommendations are listed, Including tho usual cleanliness rules, medical examinations end the uso of mercury fume doteotors, indicating and recording. 524 Industrial Arsenic Poisoning. Proitag. Z.ges.Schiess-u. Sprengstoffsw. 35. 135 (1940). (Gorman). This article emphasizes the danger of poisoning from arsine, an intensely poisoi ous gas. There is always a possibility of the formation of dangerous amounts oj arsine whon acid is brought into contact with arsenio residues or metals- com* taining arsenic. For instance, many deaths have been caused whan water is usod to wash out the sludgo contained in sulfuric add tanks. The dilute odd react* with iron to produce nascent hydrogen, which in turn reducos the arsenic, alwayi present in the sludge, to arsine. Similar possibilities exist in connection with the rofinlng of load, tin and zina, which usually contain same arsenic* I* ia Important to remember that aluminum arsenide produces arsine directly by re* action with wator. The presence of arsoalo as an Impurity in zinc in electrotechnique has also given rise to the formation of arsine. Possibilities of poisoning from solid forms of arsenic are also doseribed. 525 The Snectrographic Analysis of lead in the Blood. E.C. VlgUoni. Bass, sad, lnd. iL, 289-306 (1940). (Italian). Since it is now believed that the toxic effects of lead are due to the quantltl< in the blood, it is ossantlal for any study of lead poisoning to have a netbod - of analysis suited to the determination of very small quantities. 70r this pur pose a curve comparing the known quantities of lead end molybdenum was prepared by tho use of the line for lead at 2835 A. end for aolybdanum at 281SA. There is a good review of previous work, in which the findings of other authors on tb amounts of lead in blood of normal persona not exposed to lead, end persons ex posed to, and finally poisoned by, lead aro discussed. There Is no correlation between the amount of lead in the blood and the health of a person, same indivi< uals being much more resistant than others. However, the method can bo used successfully in the diagnosis and prognosis of lead poisoning. The values fount for normal persons not exposed to lead, and for those exposed and poisoned are, respectively 57, 68 end 108 gamma . A total of 500 determinations on 165 per sons was made. Twenty-eight references' ere citod. 526 The Bone Marrow Wnayimental Lead Poisoning. C. Betti. Bass^asd. lnd. 11. 584-603 (1940). (Italian). A description of the blstologloal characteristics of tho marrow colls of rabbitin poisoning Induced by injections of lead aeotato solution. 527 Occupational Cadmium Poisoning from Electroplating with Cadmium. O. Pancharl* Bass, mod. Induat. 11. 623-31 t1940). (Italian). Poisoning occurring in the extraction of oadmiia and fusing of alloys is des cribed, Tho author presents the caso history of a man engaged in elcctroplatim with cadmium, with description of symptoms, some of which persisted over tm weeks. No cadmium was found In the urine or foces, but it was revealed in tbs blood by spectral analysis.