Horse biscuits are the result of carefnl experimenting by the Prnssian military authorities f or some condensed form in which to pnt provender for army horses in war time. These, after a very severe trial, are admitted to be a great success. The biscuit, or as it has also been called, the " oat comfit," consists of 30 parts of oat flour, 30 païts of " dex trinated " pea meal, 30 parts of rye flonr, nd 10 parts linseed meal ; or, 40 parts f oat flour, 40 parts of dextrinated pea leal, and 20 parts of linseed meal; or,. 0 parts of pea meal, 20 parts of wheat our, 20 parts of corn, 20 parts of rye our, 10 parts of grated bread, and 10 rarts of linseed meal; or, finaüy, other analogous mixtures. The Russians also,. tried these horse biscuits during the recent war. The horses were fed on these biscuits during twenty-six days, and every day notes were made of the state, plumpness and weight of the horses, and their strength tested with the dynamometer. The superiority of the comfits over oats (a third of which are undigested and lost in the dung-heap) was so marked tliat they were adopted, not only in imitation of Prussia, as an exceptional recourse for times of war, but also as a steady food in time of peace. A ration is about 3i pounds ; it comprises f rom twenty-five to thirty biscuits of from fonr to five inches in diameter by four-tenths of an inch in thickness. These biscuits, strung on wive, can be suspended to the saddle without danger of breakage, and a horse can thus easily carry nourishment to last hini four oi five days. They are given either dry or wet (after hoving been. broken up), at the rato of seVèn in the inórning, twelve at noon and seven in the evcning.