A New Toxicant Occurring Naturally in Certain Samples of Plant Foodstuffs

Feed Additives, Metabolism of Selenium in the Mammalian Organism

“…Congenital abnormalities (monstrosities) are known to occur in embryonic chicks or in chicks hatched from eggs laid by hens fed selenium compounds or grains containing these compounds (32). Experiments were undertaken to gain insight into the effects of selenium on the embryonic development of chicks.…”

The Effect of Selenized Grains on the Rate of Growth in Chicks

“…S TUDIES dealing with the effects of feeding cereal grains containing selenium to laying hens have been previously reported by Franke and Tully (1935) and Poley et al (1937). It was also shown by Poley and Moxon (1938) that the use of more than 5 parts per million of selenium in the breeder ration resulted in lower hatchability, and that when the ration contained 10 p.p.m.…”

“…of selenium in their ration were not appreciably affected when these chicks received starting rations containing no selenium. Tully and Franke (1935) showed that the feeding of selenized grains to chicks during the first eight weeks resulted in slow growth. The amounts of selenium included in the rations were not determined.…”

The use of selenium in sprays for the control of mites on citrus and grapes

“…It has long been known that in certain localities of South Dakota unsatisfactory hatching of eggs and malformation and high mortality of chicks are of general occurrence. In a series of studies, Franke and his co-workers (Franke andTulley, 1935, 1936;Tully and Franke, 1935;Poley, Moxon, and Franke, 1937) showed that these effects are the result of selenium in the chicken feed, and that similar effects may be produced by injecting selenite into the air cell of eggs before incubation. In a feeding experiment in which chickens were placed upon a diet containing 65 per cent seleniferous grain (15 p.p.m.…”