“…The work of McCulloch (1929-30) and the striking report of Orr and Gilks (1931) on two African tribes suggest that, physiologically and psychologically, human beings are more or less a function of the food they eat. Nearer home, dietary surveys and experiments with the feeding of milk to children suggest that the diet of the industrial population may be deficient in several respects (Corry Mann, 1926;Orr, 1928;Leighton and Clark, 1929;Clark, 1929;Orr and Clark, 1930;McLaughlin et al, 1931;Rosenberg, 1931;Turbott and Rolland, 1932;Davidson et al, 1933;McGonigle, 1933aMcGonigle, , 1933b.…”