Abstract
<h3>BREAST FEEDING</h3> Kuttner and Ratner<sup>1</sup>have undertaken to investigate the work of Theobald Smith to determine the essential nature of colostrum feeding in calves. These investigators were interested in its bearing on infant feeding. Smith showed that colostrum is not alone the chief means for transferring antibodies to the new-born calf. Colostrum also seems to have the important function of protecting the new-born animal against a general invasion by organisms of the<i>bacillus coli</i>group. With this in mind, Kuttner and Ratner sought for evidence of histologic differences in the placentas of various species. They used in their researches toxin, antitoxin and the Schick test as a means of control. There were some investigators who claimed that the placenta was impermeable to antibodies and that only through the milk was immunity transferred. In approaching this problem in human beings it was divided into two lines of study: (1) to
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