. Milk. Milk. 310 MILK is necessary, probably more than in hand milking. The vacuum should not be higher than 15 to , otherwise injury to the cow may result, and the yield is not greater with a higher vacuum. Cows have to become accustomed to thei machine, and this is more difficult with some animals than with others. It has been observed that when hand milking is replaced by machine milking there is a temporary shrinkage in yield. This, however, is also true when milkers are changed, and is, therefore, no objection to the use of a machine. The cost of a machine and the cost of installing
. Milk. Milk. 310 MILK is necessary, probably more than in hand milking. The vacuum should not be higher than 15 to , otherwise injury to the cow may result, and the yield is not greater with a higher vacuum. Cows have to become accustomed to thei machine, and this is more difficult with some animals than with others. It has been observed that when hand milking is replaced by machine milking there is a temporary shrinkage in yield. This, however, is also true when milkers are changed, and is, therefore, no objection to the use of a machine. The cost of a machine and the cost of installing amounts to nearly $400. It is, therefore, not advan- tageous for herds smaller than 15 Fig. 124.—Milking machine used in experiments by Lane and Stocking. (Bull. No. 92, B. A. I.) The machine must be properly cleaned and the parts kept in brine or an equally efficient antiseptic solution between milkings. Cleaning the machine before use is estimated to occupy ten to twenty minutes, and attention after milking about twenty minutes. This extra time is, of course, more than compensated for by the time saved in milking, as each milker can handle two machines or even three at the same time, and each machine milks two cows simultaneously. In the usual form of machine the milk runs into one pail from two cows. This is a disadvantage when it is desired to learn the productivity of individual animals. Recently. 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 Heinemann, Paul Gustav. Philadelphia and London, W. B. Saunders Company
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