Blood may escape with the milk when the udder has been injured by blows; also when it is congested or inflamed, when the circulation through it has been suddenly increased by richer and more abundant feed, or when the cow is under the excitement of heat. The milk frothing up and assuming a pink tinge is often the first sign of red water, and it may result from eating acrid or irritant plants, like the RanunculaceÊ, resinous plants, etc. Deposits of tubercle or tumors in the udder, or induration of the gland, may be efficient causes, the irritation caused by milking contributing to draw the blood. Finally, there may be a reddish tinge or sediment when madder or logwood has been eaten. In milk which becomes red after it is drawn it may be from the presence in it of the _Bacillus prodigiosus._ This also grows on bread, and is the explanation of the supposed miracle of the "bleeding host." The treatment will vary with the cause. In congested glands give 1 pound of Epsom salt, and daily thereafter one-half ounce saltpeter, with a dram of chlorate of potassium; the bag should be bathed with hot or cold water, and rubbed with camphorated lard. If the feed is too rich or abundant it must be reduced. If from acrid plants, they must be removed from pasture or fodder. Induration of the udder may be met by rubbing with a combination of iodin ointment 1 part, soft soap 2 parts; mercurial ointment and soap also may be used. Careful milking is imperative. BLUE MILK. Watery milk is blue, but the presence of a germ (_Bacillus cyanogenes_) causes a distinct blue shade even in rich milk and cream. It may reach the milk after it has been drawn, or it may find its way into the opening of the milk ducts and enter the milk as it is drawn. In the latter case frequent milking and the injection of a solution of 2 drams of hyposulphite of soda in a pint of water into the teats will serve to destroy the germs. STRINGY MILK.