Market dairying and milk products . me manner in which the milkwas emptied into the bottle. 5. Mix the acid with the milk by giving the bottle aslow rotary motion. 6. Allow mixture to stand a few minutes. 7. Shake or mix again and then place the bottle inthe tester. 8. Run tester four minutes at theproper speed. 9. Add moderately hot water untilcontents come to the neck of thebottle. 10. Whirl one minute. 11. Add moderately hot water un-til contents of the bottle reach aboutthe 8% mark. 12. Whirl one minute. 13. Read test. How to Read Milk Test. At the top of the fat column is usually quite ap
Market dairying and milk products . me manner in which the milkwas emptied into the bottle. 5. Mix the acid with the milk by giving the bottle aslow rotary motion. 6. Allow mixture to stand a few minutes. 7. Shake or mix again and then place the bottle inthe tester. 8. Run tester four minutes at theproper speed. 9. Add moderately hot water untilcontents come to the neck of thebottle. 10. Whirl one minute. 11. Add moderately hot water un-til contents of the bottle reach aboutthe 8% mark. 12. Whirl one minute. 13. Read test. How to Read Milk Test. At the top of the fat column is usually quite apronounced meniscus as shown in A less pronounced one is foundat the bottom of the column. The fatshould be read from the extremes ofthe fat column, i to 3, not from 2 to 4,when its temperature is about 140° high a temperature gives too high 4. ?8 Fig. 17.—Fat coumnshowing meniscuses. THE BABCOCK TEST 55 a reading, because of the expanded condition of the fat,while too low a temperature gives an uncertain Fig. 19—Milk bot-tle tester. I. Be sure you have Fig. 18. Burette method. Precautions in Malcing a Test. a fair sample. 2. The temperature of the milk should be about 6oor yo degrees. 3. Always mix twice after acid has been added. 4. Be sure your tester runs at the right speed. 56 MARKET DAIRYING 5. Use nothing but clean, soft water in fiiling thebottles. 6. Be sure the tester does not jar. 7. Be sure the acid is of the right strength. 8. Mix as soon as acid is added to milk. 9. Do not allow the bottles to become cold beforereading the test. 10. Read the test twice to insure a correct water added to the test bottles after they have been whirled should be clean and pure. Water containingmuch lime seriously affects the test. Such water maybe used, however, when first treated with a few drops, ofsulphuric acid. As stated before skim-milk, buttermilk and cream aretested in the same way as milk, with the exception thatthe cream sample is weig
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdairyin, bookyear1913
