"Although the experiments hitherto made are, as already stated, only preliminary in nature and limited in scope, they establish beyond all question that a full and careful study of the matter is urgently called for. "For this fuller study the Cambridge laboratories do not possess at present either the necessary equipment or the funds to provide it. For the detailed study of the physical efficiency of a man under varying conditions, elaborate and expensive apparatus is required; and the advantages claimed for the special treatment of the food just discussed can only be fully tested by prolonged and laborious experiments calling for a considerable staff of workers. "It is of great importance that the mind of the lay public should be disabused of the idea that medical science is possessed of final information concerning questions of nutrition. This is very far indeed from being the case. Human nutrition involves highly complex factors, and the scientific basis for our knowledge of the subject is but small; where questions of diet are concerned, medical teaching, no less than popular practice, is to a great extent based upon empiricism. "But the scientific and social importance of the question is clearly immense, and it is greatly to be desired that its study should be encouraged. "M. FOSTER. "April 26th, 1902." * * * * * The interest excited in Professor Foster was coincident with that espoused by Dr. Professor Henry Pickering Bowditch, Professor of Physiology of Harvard Medical School, and Dean of American Physiologists. Under the ægis of such encouragement the later developments are not at all surprising. In order to extend and verify the findings of Dr. F. Gowland Hopkins, of Cambridge University, England, as stated in the preceding note by Professor Foster, Professor Russell H. Chittenden, President of the American Physiological Society, Director of the Sheffield Scientific School of Yale University, and one of the leading chemico-physiological authorities of the world, as measured by accepted research work, volunteered to submit the author to further test. The report of this test is too long for reproduction here. It was first published in the _Popular Science Monthly_ of June 1903, but will be found in full in the "A. B.-Z." just referred to. The special reference to the author's case and the quoted report of Dr. William G. Anderson, Director of the Yale Gymnasium which tells the story of efficiency, was as follows: Extract from an article by Professor Russell H. Chittenden in _Popular Science Monthly_, June, 1903.