I

Shortly after the milk is strained add to it from 1 per cent to 2 per cent of a 12-volume solution of hydrogen peroxide, and set it aside for 10 to 12 hours. It thus acquires the property of keeping perfectly sweet and fresh for 3 or 4 days, and is far preferable to milk sterilized by heat. Two points are worthy of notice in the process. The addition of oxygenated water should be made as soon after it is taken from the cow, strained, etc., as possible; the peroxide appears to destroy instantly all anaerobic microbes (such as the bacillus of green diarrhea of childhood), but has no effect upon the bacillus of tuberculosis. This process is to be especially recommended in the heat of summer, and at all times in the milk of cattle known to be free of tuberculosis.

II

Fresh milk in bottles has been treated with oxygen and carbonic acid under pressure of some atmospheres. By this method it is said to be possible to preserve milk fresh 50 to 60 days. The construction of the bottle is siphon-like.

Milk Substitute

Diamalt is a thick syrupy mass of pleasant, strong, somewhat sourish odor and sweetish taste, which is offered as a substitute for milk. The preparation has been analyzed. Its specific gravity is 1.4826; the percentage of water fluctuates between 24 and 28 per cent; the amount of ash is 1.8 per cent. There are present: Lactic acid, 0.718 to 1.51; nitrogenous matter, 4.68 to 5.06 per cent; and constituents rich in nitrogen, about 68 per cent. The latter consist principally of maltose. Dissolved in water it forms a greenish-yellow mixture. Turbidness is caused by starch grains, yeast cells, bacteria, and a shapeless coagulum.