Archive image from page 156 of Dairy chemistry; a practical handbook. Dairy chemistry; a practical handbook for dairy chemists and others having control of dairies dairychemistryp00rich Year: 1920 GERBER TESTERS. HI The ' Rapid :' gearing makes an unpleasant noise, and a great deal of the power employed to drive the machine is wasted in friction. Fie. 17.—Gerber Tester. It is far better to discard the methods of driving sold with the machine and to employ a yard of blind cord (of the best

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