IT IS a distinct honor to be invited to give the Shattuck Lecture, with its long list of distinguished former lecturers and its tradition of excellence of the addresses. I therefore appreciate greatly this honor that has come to me and the opportunity to address the Massachusetts Medical Society on this occasion.So far as the practice of medicine is concerned, the title of my lecture is somewhat of a misnomer, because the direct contribution of the war to clinical nutrition was not very great. Actual nutritional-deficiency disease was not common in the troops. Most of the actual work in . . .