The present report deals with alterations in the teeth of dogs, which have been produced by imposing restricted diets. It is, in a sense, preliminary in nature, for the results have been so striking that a repetition of the experiment is advisable before complete data can be compiled and presented.
That portion of the problem which includes a study of the diet and changes produced in the bony growth of the animals will be reported elsewhere. My principal concern lies with a statement of changes produced in the teeth. My participation in this research has been secondary in that I have had no direct responsibility in working on the food or excreta of the animals. Through the courtesy of Dr. W. P. Lucas, professor of pediatrics, University of California Medical School, and Dr. Martha Jones of the George Williams Hooper Foundation for Medical Research, I have had the opportunity of