The Ca-content of bone and liver of artificially induced rachitic animals is increased obviusly by an injection of vitamin D_2. Their P-content is observed also to increase, though not so pronounoedly as in the case of Ca. On the contrary, the Na- and K-contents of liver decrease markedly in the case of malnourished rachitic animals. Those of bone show also a decreasing tendency. The contents of Fe and Cu increase in the bone on injection of vitamin D_2,but decrease in the liver, both approaching the corresponding values in the bone and liver of the control animals.