Dust, in some places termed cumins, is that portion of barley which sprouts in germination. It is generally given to cattle, but horses sometimes get it mixed with the boiled food. They seem to like it very well. I do not know any more about it.

Grains, the refuse of breweries, are sometimes given to horses, and are eaten greedily; but it is alleged that, when given constantly, and so as to form the bulk of the grain, they produce general rottenness, which I suspect in this case means disease of the liver. They are also blamed for producing staggers and founder.

[The cart-horses of the breweries of London are fed on grains. But they are horses largely disposed to fat, and have small lungs and livers. The well-bred horse when in quick work does not take on fat readily; his lungs and liver are large. Grains consist of carbon and fecal matter. In the cart-horse, a part of the carbon of the grains is consumed in breathing, and the balance is deposited in the cellular tissue as fat. In the horse of quick work, the lungs and liver take up all the carbon, which being in excess acts to produce large quantities of bile; this bile is passed off by the bowels, occasioning purging, and by reaction, costiveness. The bowels and the liver sympathize until the liver becomes diseased: and this disease usually is imflammatory in its early stages, ending in death by inflammation immediately or by ulceration ultimately. In the southern country, well-bred horses in quick work, fed on Indian corn (which abounds largely in the fat-forming principle), suffer in the same manner. The well-bred or blood horse, not in quick work, fats rapidly on corn, and would doubtless on grains. Where Indian corn is fed exclusively, as in the southern states, diseases of the liver are very frequent and fatal, and so are inflammation of the bowels and colic.

The mule, in comparison with the blood-horse, has small lungs and liver, and is slow in his paces. He does better on Indian corn, especially if ground with the cob on, and this meal is fed to him. In the training stables of both the south and the north, in this country, little Indian corn is fed and this is cracked coarse like hommony.]

Barley Dust is rather better than oat dust, but it is fitter for cattle or swine than horses.