Straw was formerly regarded merelyas a subsidiary article of food for animals and was administrated to them only in admixture with fodder of high nutritive value. In Horses in Europe, for example.,were not given pure oats but a mixture of oats and finely cut-up straw.During the war.however, it was found necessary to make exact researches as to the nutritive value of straw. and it was found that it contained very considerable quantities of albumen etc.but that these food substances are assimilated by the animal stomach only to a very small extent because they he deeply embedded within the straw cellulose. The greater portion of the nutritive substances,therefore leave the body of the animal in an undigested condition.