The reproduction records of these animals are of special interest. The corn- fed heifers invariably carried their young to full term. The young showed remarkable vigor, and were normal in size and able to stand and suck within an hour after birth, as is the rule with vigorous calves. All lived and developed in a normal manner. The young of the wheat-fed mothers were the reverse in all respects. They were born three to four weeks too soon, and were small, weighing on an average 46 pounds, whereas the young of the corn-fed animals weighed 73 to 75 pounds each. The latter weight is normal for new-born calves. The young of the wheat-fed mothers were either dead when born or died within a few hours. The young of the mothers which had grown up on the oat-plant ration were almost as large as those from the corn-fed mothers, the average weight being 71 pounds. All of the cows in this group produced their young about two weeks too soon. One of the four was born dead, two were very weak and died within a day or two after birth. The fourth was weak but with care it was kept alive. The young of the cows which were fed the mixture of the three-plant products were weak in most cases. One was born dead and one lived but six days. The mothers were continued on the experimental rations and the following year they repeated in all essential details the reproduction records observed in the first gestation periods.