The increased elimination of urinary citrate effected by the administration of vitamin D (1) raises the question whether this is the result of a lowering of the renal threshold or a response to an increased accumulation in body tissues, or both. The reports in the literature on tissue citrate in this connection are limited and conflicting. While Freeman and Chang (2) and Harrison and Harrison (...

Boric acid lactose broth has been suggested (Levine et al., 1934; Vaughn and Levine, 1935; Vaughn et al., 1951; Levine et al., 1955) as a medium for the detection of Escherichia coli in water and in foods. This medium is designed to suppress Escherichia freundii and species of Aerobacter, organisms often considered to be nonfecal in origin. The published results are rather convincing where sepa...