ILLUSTRATIONS 



26. Pasteurizer , 



27. Regenerative Cooler 



28. A Simple Holding Tank 



29. Retarder of the Tank Type 



30. A Combined Pasteurizer and Holder , 



31. Quevenne's Lactometer 



32. Westphal Balance 



33. Modern Type of Babcock Milk-testing Bottle 



34. Pipette Used in Babcock Test for Measuring Milk . . 



35. Cylinder Used in Babcock Test for Measuring Acid 



36. Bottle and Pipettes Used in Gerber Test 



37. Feser's Lactoscope 



38. Zeiss Dipping Refractometer 



39. Sediment Tube Used in the Trommsdorff Test 



40. Gerber-Lobeck Catalase Apparatus 



