The mechanism of secretion of calcium and phosphorus in milk

Abstract
1. The formation of colloidal CaHPO4by the interaction of CaCl2and Na2HPO4in the presence of neutral casemates has been demonstrated.2. The colloidal CaHPO4is shown to be non-diffusible across a membrane of cellophane.3. A theory is outlined which will account for the secretion of the high concentrations of calcium and phosphorus in milk from the low concentrations of these elements in the blood.