Archive image from page 157 of Dairy chemistry; a practical handbook. Dairy chemistry; a practical handbook for dairy chemists and others having control of dairies dairychemistryp00rich Year: 1920 142 VOLUMETRIC AND INDIRECT ESTIMATION OF FAT. is held iu the right hand and the loose end in the left. The cord is pnlled with the right hand, just sufficient tension being kept on the end with the left to make it bite. At the end of the stroke, the left hand is brought up near the machine to loosen the cord round the spindle, otherwise there is danger of the cord winding up. The cord is now pulle
Archive image from page 157 of Dairy chemistry; a practical handbook. Dairy chemistry; a practical handbook for dairy chemists and others having control of dairies dairychemistryp00rich Year: 1920 142 VOLUMETRIC AND INDIRECT ESTIMATION OF FAT. is held iu the right hand and the loose end in the left. The cord is pnlled with the right hand, just sufficient tension being kept on the end with the left to make it bite. At the end of the stroke, the left hand is brought up near the machine to loosen the cord round the spindle, otherwise there is danger of the cord winding up. The cord is now pulled back with the left hand keeping it quite loose—, letting the right hand go back quite freely. The pulling with the right hand is re- peated, and continued till the speed is high enough. It is advisable to stop up the hole in the spindle, as it causes the cord to wear. Should the cord wear out and break, it can be replaced easily at an infinitesimal cost. This method of driving was worked out in the author's laboratory by Boseley and Rosier. The Lister Machine.— This has practically the same form as the Gaertner- HugershofT machine, but does uot include the ' Excelsior ' or' Rapid ' gearings, which are covered by patents. The frame is of different con- struction, and is S-shaped. Round the spindle a small brass pulley is fixed (in the 24-bottle machine a ratchet is added), and it is driven by a string wound round Figs. 19 and 20.—Gerber Bottles. tys j,y Boseley and Rosier's method, which, however, was independently applied by Lister. In practice it is better to take off the pulley, stop up the hole, and drive on the spindle direct. The machines have also been made without the pulley.
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