. Dairy chemistry; a practical handbook for dairy chemists and others having control of dairies. Dairy products. APPARATUS. 143 The 2-bottle machine has the arms hinged, and clamped in place by a screw, instead of having them in one piece ; it is more easily portable. There are many other machines now on the market, which in general principle are much the same as the original Gaertner- Hugershoff centrifuges. Some of these are driven by a handle (Fig. 17), which, by means of a worm gearing, imparts a rapid motion to the spindle, and this method of driving finds favour with those who do not min
. Dairy chemistry; a practical handbook for dairy chemists and others having control of dairies. Dairy products. APPARATUS. 143 The 2-bottle machine has the arms hinged, and clamped in place by a screw, instead of having them in one piece ; it is more easily portable. There are many other machines now on the market, which in general principle are much the same as the original Gaertner- Hugershoff centrifuges. Some of these are driven by a handle (Fig. 17), which, by means of a worm gearing, imparts a rapid motion to the spindle, and this method of driving finds favour with those who do not mind the extra expense. Steam turbines, water turbines, and electro-motors (Fig. 18) are also largely used as the motive power, especially with large machines. Apparatus, etc.—1. The acido-butyro- meter is a glass vessel closed by an india- rubber cork, and with a graduated neck divided into ninety divisions; one di- vision = 0*1 per cent. fat. Every tenth division is longer than the others, and the intermediate fifth divisions are also length- ened slightly to facilitate reading. The neck may be either round, as in Gerber's original butyrometers, square section for extra strength, or flat for ease in reading (Figs. 19 and 20). A special acido-butyrometer is made for skim milk ; the upper portion of the neck is narrowed, and the divisions are much wider. 2. The acido-butyrometer for cheese, etc., is open at both ends, and the lower cork carries a small glass cup. 3. The author's butyrometer stand con- sists of a metal plate pierced with 4, 8, or 24 holes, and an india-rubber plate with 4, 8, or 24 corresponding holes so cut that the butyrometers are slid easily in and out and yet are retained when inserted. 4. 11 pipettes for milk with, or without, automatic measurement. 4a. 3 pipettes for cream. 5. 1 pipette for amyl alcohol. 6. A water pipette, 10 in ^ 6a. A water pipette for cream, delivering 8-2 7. 10 bulb pipette for acid. The bulbs preven
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherlondo, bookyear1920
