178 



THE ANALYSIS OF MILK. 



hydrometer with the thermometer attached. This is about 

 seven inches long and has a range of from 1.000 to 1.060. 

 There are several different forms of lactometers on the market 

 but they are not any better adapted for milk than is the hydrom- 

 eter to which reference has just been made. All readings 

 should be made whenever possible at 60 F. (15.6C.). When- 

 ever this cannot be done correction must be made in accordance 

 with the table below, taken from Richmond (12). 



TABLE IX. 

 FOR CORRECTING SPECIFIC GRAVITY TO 60F. 



The specific gravity of milk from normal, healthy cows will 

 vary from 1.029 to 1.035 at 60 F (15.6 C). The average for 

 normal milk as determined by the writer from a large number 

 of samples agrees well with the figures obtained elsewhere, 

 namely 1.032. Too much stress cannot be placed on the spe- 

 cific gravity determination, because it is a simple matter to add 



