Archive image from page 374 of Dairy farming being the. Dairy farming : being the theory, practice, and methods of dairying dairyfarmingbein00shel Year: 1880 CENTRIFUGAL CREAM-EXTRACTORS. 303 wood, l)i'ick, stoue, eoucreto, or irou—so long as the following requisites are secured: first, perfect drainage, with complete exclusion of air below; second, good ventilation above ; third, ample non- conducting material around and above the ice; fourth, total exclusion from the ice of all outside water and air; and fifth, solid, compact packing of the ice in the house when the weather is dry and col
Archive image from page 374 of Dairy farming being the. Dairy farming : being the theory, practice, and methods of dairying dairyfarmingbein00shel Year: 1880 CENTRIFUGAL CREAM-EXTRACTORS. 303 wood, l)i'ick, stoue, eoucreto, or irou—so long as the following requisites are secured: first, perfect drainage, with complete exclusion of air below; second, good ventilation above ; third, ample non- conducting material around and above the ice; fourth, total exclusion from the ice of all outside water and air; and fifth, solid, compact packing of the ice in the house when the weather is dry and cold. Centrifugal Cream-exthactoks. The most recent and striking methods of separating cream from milk come to us from Germany. At the International Dairy Show, held in Hamburg in March, 1877, we saw at work the instrument of which we give an illustration in Fig. 165. As will be noticed, it consists of two wheels in a stand, one of which actuates the other by means of a belt. In the upper wheel four glass tubes, containingmilk, are securely placed ; the lower wheel is then turned by hand, giving the upper one upwards of 1,000 re- volutions per minute. Whirling round at this great speed brings centrifugal force to bear on the milk in the tubes, and the cream, being lightest, collects at one end and the cream- less milk at the other; the sejiai-ation is com- plete and clearly defined, as in an ordinary cream-gauge. The time required by the centri- fugal machine to complete the separation of cream from milk is from ten to thirty minutes, according to circumstances. Larger machines are now made, capable of dealing with as much as 200 quarts of milk, and though they are not at present quite perfected, there can be no doubt of their ultimate success. By a later imjirovement the cream is drawn off while the machine is still in rapid motion, instead of stopping it and waiting for the milk to settle down; while still in motion a quantity of skim-milk is caused to How in, and, as the vess
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