Abstract
MOREHOUSE and Mayfield (1946) mentioned briefly an apparent growth stimulating effect of 3-nitro, 4-hydroxyphenylarsonic acid on chickens and turkeys. Bird, Groschke and Rubin (1948) extended this finding to include administration of the arsenical through certain basal diets deficient in vitamin B12. In the Report of the Chief of the Bureau of Animal Industry (1950) it was stated that the effects of vitamin B12, aureomycin and arsonic acid appeared to be additive. Couch (1952) has also indicated that either of two arsenicals commercially available produced small growth increases when added to basal broiler diets containing vitamin B12 and an antibiotic. His birds were carried to 10 weeks of age. Combs and Laurent (1953) obtained improved growth and a slight reduction in mortality when arsonic acid was added to a practical broiler ration containing animal protein and an antibiotic. Disease was a serious problem in the test. On the other hand, Scott …
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