Milk and its products; a treatise upon the nature and qualities of dairy milk and the manufacture of butter and cheese . ly that no cold airenters the chamber during the whirling; the bottlesare often heated to such a degree that the readingis made too large because of the expansion of thefat at the high temperature. The fat should be readat a temperature of 110° F.,but up to 140° F. the expan-sion is not sufficient to causematerial error. When, how-ever, the temperature rises to200° F. or thereabout, as fre-quently occurs under the con-ditions named above, the errordue to the expan-sion of th
Milk and its products; a treatise upon the nature and qualities of dairy milk and the manufacture of butter and cheese . ly that no cold airenters the chamber during the whirling; the bottlesare often heated to such a degree that the readingis made too large because of the expansion of thefat at the high temperature. The fat should be readat a temperature of 110° F.,but up to 140° F. the expan-sion is not sufficient to causematerial error. When, how-ever, the temperature rises to200° F. or thereabout, as fre-quently occurs under the con-ditions named above, the errordue to the expan-sion of the fat mayamount to .15 per cent. In allsuch cases the bot-tles should be al-lowed to cool to atleast 140° F. beforereading. Those cen-trifugals are mostsatisfactory in which provision is made for the bottlesto assume a perfectly horizontal position when in mo-tion and a perfectly perpendicular one when at glassware.— The glassware consists of a flaskor test bottle in which the -determination is made,a graduated pipette for measuring the milk, and ashort graduated glass cylinder for measuring the. Fig. 13. Steam turbine centrifugal forBabeoek test. (See opposite page.) 96 Milk and Its Prodticts acid. The most essential feature of the glasswareis that it should be accurately graduated. This ingeneral can be secured l)y always procuring theglassware from a reliable manufacturer or dealer,
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
