Composite samples of eggs laid on the same days by pullets of the same age and breeding but receiving different diets were analyzed, and by means of a suitable statistical method it was shown that the composition of these eggs was affected by diet. The eggs produced by pullets receiving a well balanced diet differed in composition from eggs resulting from the feeding of less satisfactory diets. The yolks appeared to be more readily affected by diet than the whites. The most consistent difference, although it was small, was observed between the percentage of protein in the dry matter of the yolks of eggs laid by pullets receiving a diet containing crab meal and those receiving the other diets. This difference was demonstrable by the usual method of comparing means and their probable errors, as well as by “Student's” method.