Publisher's Synopsis
Excerpt from The Effect of Cod Liver Oil and of Butter Fat Upon the Metabolism of Calcium and Phosphorous: Thesis for the Degree of Doctor of Public Health
In the mean time Stepp in 1909 published his work. Mice fed on diets extracted with either and chloroform died within thirty days, whereas controls fed on the same without the either and chloroform extraction were living agter a period of six weeks. He also worked with pigeons and finally concluded that only certain lipins were necessary to supplement successfully a diet of purified food substances of the hitherto recognized group of ffiods. (5)
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