Further Observations on the Influence of Sunlight upon the Growth-promoting and Anti-rachitic Properties of Cow's Milk

Abstract

], it was shown that during summer, when the cow was pasture-fed, the anti-rachitic value of the cow's milk was increased above that of the milk afforded by the same animal when stall-fed and kept in the dark. The growth-promoting 'value of the milk was also shown to vary within wide limits which corresponded to variations in the animal's diet. Upon a diet of fresh green grass she' yielded a milk superior in growth-promoting quality to that obtained when her diet was a dry fodder, deficient in fat-soluble vitamins. An attempt was also made to determine' the effect on the anti-rachitic and growth-promoting value of the 'milk of exposing the cow to varying degrees of illumination, whilst keeping her upon a constant diet, but the results obtained up to the time of publication were not conclusive.