Observations on the growth and nitrogen retentions of a group of infants fed undiluted milk have been reported.1 This type of feeding resulted in an increased rate of growth in both weight and length, accompanied by nitrogen retention values greater than those of infants receiving less food. It is my purpose in this paper to record the observations concerning the calcium and phosphorus metabolism of these infants.
The type of feeding and the technic of collection of excreta were reported in detail in the previous paper. The infants received undiluted lactic acid milk with the addition of corn syrup (6 per cent of the volume of the milk). The quantity was gradually increased from 600 cc. of milk at 1 month of age to 1,000 cc. (1 quart) at 6 months of age. One teaspoonful of cod liver oil and 1 or 2 ounces of orange juice were given