. Preventive medicine and hygiene. bits the mortality of the young during the first four days afterbirth was per cent, for offspring of leaded males, as contrastedwith per cent, for offspring of normal males. The average weightat birth was grams for the former and grams for the latter. ^ Cited in G. C. Nijhoffs article on Action on Ovum of Superfluous Semen,Nederl. Tijdschr. v. Geneeskunde, Amsterdam, II, No. 16. ^Cole and Bauchhuber: Proc. Soc. Exper. Biol, and Med., 1914. DISEASES OF OCCUPATION 1051 With Leghorn hens the results were similar. Weller ^ used commercialwhite
. Preventive medicine and hygiene. bits the mortality of the young during the first four days afterbirth was per cent, for offspring of leaded males, as contrastedwith per cent, for offspring of normal males. The average weightat birth was grams for the former and grams for the latter. ^ Cited in G. C. Nijhoffs article on Action on Ovum of Superfluous Semen,Nederl. Tijdschr. v. Geneeskunde, Amsterdam, II, No. 16. ^Cole and Bauchhuber: Proc. Soc. Exper. Biol, and Med., 1914. DISEASES OF OCCUPATION 1051 With Leghorn hens the results were similar. Weller ^ used commercialwhite lead (basic carbonate), which he fed in capsules to experiments showed that paternal lead poisoning in guinea-pigs doesnot result in sterility or in stillbirth, but in reduction of weight at birth,and this underweight persists through life. Xext to this, the most strik-ing change is the high rate of mortality during the first few days afterbirth. The character of certain occupations has an influence on the type of. Fig. 147.—A Worker with Lead Oxid, Showing Respirator to Protect HimselfAGAINST the Poisonous Dust. (Mass. State Board of Health.) lead-poisoning which develops. Thus Teleky finds that, while composi-tors in Vienna seldom suffer from colic or from the severer types of leadpoisoning, they are subject to an unusual extent to diseases of the lungsand kidneys. The relation between tuberculosis and chronic plumbismis shown in Hahns diagrams based on the records of typographical tradesin Vienna and Berlin, the curves of the two diseases showing a remark-able parallelism. Colic is said by Legge to be most frequent amongworkers in white lead, red lead, enameling, storage-batteries, coach-paint-ing (which involves sandpapering), while the severer form with pa- ^ Weller, C. V.: Jour. Med. Research, 1915, XXXIII, EflFect on the OfiFspring of Lead Poisoning in the Father: J. A. M. A.,Dec. 25, 1915, LXV, No. 26. 1052 HYGIENE AND DISEASES OF OCCUPATION r
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