A Preliminary Study of Factors Influencing Calcification Processes in the Rabbit

Abstract
Diets are described which, while allowing good growth and good general health in rabbits, produce very defective calcification of teeth and bones, the degree of abnormal calcification being related to age. The worst calcification followed when the Ca and P of the diet approached values which have been described as likely to prevent rickets in rats. If x gm. of a diet produces rickets, 2x gm. of the same diet will produce worse rickets. Calcification in rabbits responds immediately, as in other animals, to an increase in calcifying vitamin in the diet, and to exposure either of the animal or food to ultraviolet radiations. Examination of some vegetable foods indicates a deficiency in calcifying vitamin. Grass, especially summer-grown grass, contains more than cabbage; and of the root-vegetables, carrot and swede-turnip contain more than white turnip.

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