USE OF THE LACTOMETER 19 



having a temperature of 50 F. Heat milk to 60 F., 

 noting changes in lactometer reading. Take sample 

 of milk for fat test and set it aside. Now add a 



FIG. 20. Quevenne Lactometers 



definite proportion of water to the milk in the beaker 

 and take readings at the same temperatures as before. 

 What is the difference? Why? Calculate formula 



