Xll ILLUSTRATIONS 



Farrington's Bottle-Cleaner Bottle-Holder Immersed 52 



Farrington's Bottle-Cleaner Bottle-Holder Draining 52 



Correct Way of Holding Pipette and Bottle ... 55 



Wrong Way of Holding Pipette and Bottle .... 56 



Measuring Fat-Column L . 63 



Automatic Russian Pipette 67 



Russian Test-Bottle . 67 



Bulb-Necked Cream-Bottle ' 70 



Straight-Necked Cream-Bottle .- 71 



Cream-Testing Scales 72 



Cream-Sampling Sieve 74 



Bottles for Testing Skim-Milk 82 



Bottle for Testing Butter 86 



Wagner's Improved Form of Gray's Water-Test . 91 



Mann's Acid Test 101 



Farrington's Alkaline-Tablet Test ...... 104 



Spillman's Acid-Cylinder 105 



Purdue Alkali-Test 107 



Hand-Centrifuge for Sedimentation Work .... 118 



Tube for Sedimentation Work ....... 118 



Bausch & Lomb Electric Centrifuge 118 



International Instrument Co.'s Electric Centrifuge . 119 



Glass for Collecting Sediment in Milk 120 



Monrad Rennet-Test 121 



Marschall Rennet-Test 123 



Quevenne Lactometer 130 



Cylinder for Lactometer 133 



Comparison of Different Specific Gravity Scales . . 134 



Richmond's Slide-Rule . . . . . . . . . . 138 



Butter-Trier 159 



