Chlorid metabolism experiments were conducted at the same time as those on calcium, previously reported,1 and on the same subjects. We were unable to find that any work has been done with breast milk and cow's milk, using the same infant as subject. The literature on chlorid metabolism, therefore, deals with different subjects on a breast milk diet and others on a diet with cow's milk. Blauberg2 compared the relative utilization of chlorid in diluted and undiluted cow's milk with that of breast milk. He used one subject for each kind of milk, and found the highest utilization in breast milk, 93.1 per cent. With undiluted cow's milk the figure was 81.8 per cent, and with modified cow's milk 59.4 per cent. He found that chlorids were utilized more completely than any other of the minerals.
Hoobler3 calls attention to the fact that sodium chlorid has the