Abstract
Summary During a study of some physical properties of milk, several observations were made regarding the density of milk. Unlike water, milk does not exhibit a maximum density at 4° C. However, at 4° C, there appeared to be an irregular change in density of milk. Between 18° and 44° C, the density of milk was within 0.0005 g. per milliliter, a linear function of temperature. A temperature coefficient of 0.00038 was calculated to convert density determinations at any temperature between 18° and 44° C. to any other temperature in that range. Homogenization of milk at pressures ranging from 500 to 3,000 p.s.i. had no significant effect upon density. However, a very highly significant increase in density of milk occurred with each increase in homogenization pressure until 300 p.s.i. was reached.
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