egg, meat, milk or potatoes. Spinach leaves are much richer in the fat-soluble vitamin than are most of the products used in our ordinary rations. So far as the limited data now available permit deductions of a general nature, it seems, according to Osborne and Mendel,* that the green vegetables supply an important addition to the diet of man because the staples, such as cereals, meats, potatoes, fats and sugar, probably furnish too small an amount of either of these vita¬ mins to meet fully

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... requirements of an adequate dietary. Therefore care should be taken not to reduce