. Western agriculture. If a greater differencethan this is found, the test should becarefully repeated. Fill the acid measure to the ) and carefully pour the acidinto the bottle. Revolvethe bottle slowly as the acidruns in so as to remove anymilk or cream thatmay be clingingthere. Mix thej ? \ m I contents thor- II Is. ft m oughly by care- fully shaking thebottle in a rotarymotion. Thisshould be contin-ued till the curdhas been com-pletely dissolvedas shown by theresulting mix-tures assuming a brownish black color. The shaking shouldbe gentle to avoid slopping into the neck of the
. Western agriculture. If a greater differencethan this is found, the test should becarefully repeated. Fill the acid measure to the ) and carefully pour the acidinto the bottle. Revolvethe bottle slowly as the acidruns in so as to remove anymilk or cream thatmay be clingingthere. Mix thej ? \ m I contents thor- II Is. ft m oughly by care- fully shaking thebottle in a rotarymotion. Thisshould be contin-ued till the curdhas been com-pletely dissolvedas shown by theresulting mix-tures assuming a brownish black color. The shaking shouldbe gentle to avoid slopping into the neck of the bottle. Put the bottles at once into the machine. Arrange themopposite each other to insure a proper balance and, therefore,smooth running of the machine. Whirl at the speed indi-cated on the tester which is usually from 80 to 100 turns perminute with hand machines. The first whirling should con-tinue for five minutes. Stop the machine gradually and addhot water (about 150° F.) to the bottles with a clean pipette. III Figure 180.—Apparatus used in sampling and testing milk: A, Pipette; E, Milk thief for sampling; D, Dividers; B, Test bottle for milk; C, Acid measure. MILK AND ITS PRODUCTS 393
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