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Memorial service for Edgar Fahs Smith
Sept., I929.]
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action are excluded from the statistics, it is then found that the per cent. of the gas casualties who died was: British Army 3.3, German Army 2.9, United States Army 2. The per cent. of casualties from all otbor weapons who died was: British Army 36.6, German Army 43, United States Army 24. J. S. H. Memorial Service for Edgar Fahs Smith. The proceedings of the memorial service for the late Provost Smith, held under the auspices of the University of Pennsylvania on December 4, 1928, have been published as a brochure of 62 pages. It contains the addresses by Francis Xavier Dercum, Marston Taylor Bogert, and Josiah Harmar Penniman, the invocation and the benediction by Richard Montgomery, a picture and biographical summary of Dr. Smith, and a bibliography of his publications and of the doctoral theses prepared under his direction.
J S.H. Atomic Weight of Nickel. GREGORYPAUL BAXTER AND SABURO ISHIMARU (ft. Am. Chem. Soc., 1929, 5I, I729-I735) have compared the atomic weights of terrestrial and meteoric nickel. They find that nickel extracted from a new meteorite has the same isotopic composition as terrestrial nickel. By the analysis of nickelous bromide, they obtain 58.694 as the atomic weight of nickel. The average value of the most recent determinations of this constant is 58.697.
j. s. H. Health Hazards in Chromium Plating. J.J. BLOOMFIELDAND WILLIAM BLUM (Public Health Reports, I928 , 4], 2330--235I) have made a study of several chromium plating plants. They find that a real, though not critical, hazard exists in this industry. [nflammarion of the nasal tissues and even perforation of the nasal septurn may occur. The digestive system and the respiratory system are not injured. Continuous daily exposure to concentrations of chromic acid greater than I milligram per Io cubic meters of air is likely to exert an injurious action on the tissues of the nose. Neither natural nor vertical ventilation is effective in removing the chromic acid spray which is produced during plating. Transverse ventilation should be used, drawing the air laterally across the surface of the tank into ducts at its top. These ducts should be I to 2 inches wide and extend the entire length of the tank. Each duct should not draw air for a lateral distance in excess of I8 inches. The air should have a velocity of approximately 2ooo
45I
CURRENT TOPICS.
action are excluded from the statistics, it is then found that the per cent. of the gas casualties who died was: British Army 3.3, German Army 2.9, United States Army 2. The per cent. of casualties from all otbor weapons who died was: British Army 36.6, German Army 43, United States Army 24. J. S. H. Memorial Service for Edgar Fahs Smith. The proceedings of the memorial service for the late Provost Smith, held under the auspices of the University of Pennsylvania on December 4, 1928, have been published as a brochure of 62 pages. It contains the addresses by Francis Xavier Dercum, Marston Taylor Bogert, and Josiah Harmar Penniman, the invocation and the benediction by Richard Montgomery, a picture and biographical summary of Dr. Smith, and a bibliography of his publications and of the doctoral theses prepared under his direction.
J S.H. Atomic Weight of Nickel. GREGORYPAUL BAXTER AND SABURO ISHIMARU (ft. Am. Chem. Soc., 1929, 5I, I729-I735) have compared the atomic weights of terrestrial and meteoric nickel. They find that nickel extracted from a new meteorite has the same isotopic composition as terrestrial nickel. By the analysis of nickelous bromide, they obtain 58.694 as the atomic weight of nickel. The average value of the most recent determinations of this constant is 58.697.
j. s. H. Health Hazards in Chromium Plating. J.J. BLOOMFIELDAND WILLIAM BLUM (Public Health Reports, I928 , 4], 2330--235I) have made a study of several chromium plating plants. They find that a real, though not critical, hazard exists in this industry. [nflammarion of the nasal tissues and even perforation of the nasal septurn may occur. The digestive system and the respiratory system are not injured. Continuous daily exposure to concentrations of chromic acid greater than I milligram per Io cubic meters of air is likely to exert an injurious action on the tissues of the nose. Neither natural nor vertical ventilation is effective in removing the chromic acid spray which is produced during plating. Transverse ventilation should be used, drawing the air laterally across the surface of the tank into ducts at its top. These ducts should be I to 2 inches wide and extend the entire length of the tank. Each duct should not draw air for a lateral distance in excess of I8 inches. The air should have a velocity of approximately 2ooo