or biological value. In fact, there appeared to be no influence of rate of infusion on nitrogen retention whether the amino acid mixture was given as a sole source of nitrogen or as a supplement to small or large protein intakes by mouth.S~J W H Q T~. 1. Seven subjects (including normal individuals and patients) were given daily intravenous infusions of a 10% solution of amino acids at widely varying rates of infusion. 2. There was no correlation between the daily non-protein nitrogen escretion and the rate of infusion. Very rapid rates of infusion did not increase the nitrogen escretion and thus did not reduce the biological value of the amino acid solution.

189propionate in the damaged patient are dispartial fulfillment of the requirements for the degree cussed.of Master of Sbcience in Physiology. The authors wish to thank the Schering Corporation for a generous supply of testosterone propionate. A part of this report is based on work done by Capt. Braasch in the