The Ascorbic Acid Content of the Liver in Pregnant Mice*

The mice were drawn from stock and MRC breeds, the characters of which are described in the previous paper (1) , and from the pure lines C57, CBA, C3H, and dba. As far as was possible a pregnant and a nonpregnant mouse of any one breed, of similar age, were examined on the same day, as a safeguard against any variations due to the season of the year or to changes in the quality of the foodstuffs. The stant change in the magni tude of the results for concentration of ascorbic acid in the liver (Table I) ; in some strains the mean is greater, in some less, in the new series. The order of the means is, for the 4 pure lines, the same in the old and new series. Thus the ascending order of all the means runs as follows: