. Testing milk and its products; a manual for dairy students, creamery and cheese factory operators, food chemists, and dairy farmers. The Babcock Test. 45 frame is reversed and placed in the position shown in II. One or two rinsings in boiling hot water is usually sufficient to effectually clean the bottles, but when they have been allowed to get greasy they can be dipped into a pail of hot dilute lye; this will saponify the grease and after one or two rinsings in clean hot water the bottles will be bright and clean. The black stains that sometimes stick to the inside of test bottles after pr
. Testing milk and its products; a manual for dairy students, creamery and cheese factory operators, food chemists, and dairy farmers. The Babcock Test. 45 frame is reversed and placed in the position shown in II. One or two rinsings in boiling hot water is usually sufficient to effectually clean the bottles, but when they have been allowed to get greasy they can be dipped into a pail of hot dilute lye; this will saponify the grease and after one or two rinsings in clean hot water the bottles will be bright and clean. The black stains that sometimes stick to the inside of test bottles after prolonged use, can be removed with a little muriatic acid, or by means of a small stiff brush. 48. Pipette. The difference in the weights of various samples of normal milk generally falls within compara- tively narrow limits; if a given volume of water weighs one pound, the same volume of the usual grades of nor- mal milk will weigh from to pounds, or on the average, lbs. 18 grams of water measures 18 Qc}; 18 grams of milk will therefore take up a smaller volume than 18 cc, \iz., 18 divided by , which is very nearly This is the quantity of milk taken in the Babcock test. A certain amount of milk will adhere to the walls of the pi- pette when it is emptied, and this thin film has been found to weigh about one-tenth of a gram; consequently cc. has been adopted as the capacity of the pipette used for delivering 18 grams of milk. For convenience in measuring the milk, the shape of the pipette is of importance. , points- ^ x' r- L- ^ proper con- The mark on the stem shoiTld be two inches ''f™''\'°°K', ^• unaeslranle or more from the upper end of the pip- 'Cubic centlmeterc (abbreviated: cc.) are the standard used for mensurlne volnme in the metrlr system, similar to the quart or pint. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance
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