. Testing milk and its products; a manual for dairy students, creamery and cheese factory operators, food chemists, and dairy farmers. 42 Testing MUk and Its Products. be found to stick very tenaciously to the bottom of the bottle in the subsequent cleaning with water. A convenient method of emptying test bottles is shown in the illustration (fig. 12). After reading the fat col- umn, the bottles are placed neck down, in the half-inch holes of the board cover of a five-gallon stoneware jar. An occasional shaking while the liquid is running from the bottles will rinse off the preciptate of sulfa
. Testing milk and its products; a manual for dairy students, creamery and cheese factory operators, food chemists, and dairy farmers. 42 Testing MUk and Its Products. be found to stick very tenaciously to the bottom of the bottle in the subsequent cleaning with water. A convenient method of emptying test bottles is shown in the illustration (fig. 12). After reading the fat col- umn, the bottles are placed neck down, in the half-inch holes of the board cover of a five-gallon stoneware jar. An occasional shaking while the liquid is running from the bottles will rinse off the preciptate of sulfate of lime A thorough rinsing with boiling hot water is generally sufficient to remove all grease and dirt, as well as acid solution from the inside of the bottles, The apparatus shown in fig. 13 will be found convenient for this purpose. After the bottles have been rinsed a second time, they may be placed in an inverted posi- tion to drain, on a galvanized iron rack, as shown in fig. 14, where they are kept until needed. The outside of the bottles should occasionally be wiped clean and dry. 47. The amount of unseen fat that clings to test bottles used for testing milk or cream, is generally not sufficient to be noticed in test- ing whole milk, but it plays an important part in test- ing samples of separator skim milk. It may be readily brought to light by making a blank test with clean water in bottles used for testing ordinary milk, which have been cleaned by simply draining the contents and rinsing once or twice with hot water; at the conclusion of the test the operator will generally find that a few. Fig. 14. Draining rack tor test Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Farrington, Edward Holyoke, 1860-; Woll, Fritz Wilhelm, 1865-1922. Madison, Wis. , Mendota Book Company
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