76 MARKET DAIRYING 
one-tenth of a lactometer degree for every degree of tem- 
perature above 60. A decrease in temperature would 
result in a corresponding increase in the specific gravity. 
For every degree below 60, therefore, we subtract one- 
tenth degree from, and for every degree above 60 we 
Fig. 30. 
Lactom Fig. 31.—Lactom- 
eter. eter cylinder. 
add one-tenth degree to, the lactometer reading. Ex- 
amples: 
1. Lactometer reading is 32.5 at a temperature of 55. 
Corrected reading is 32.5 less .5, equals 32. 
2. Lactometer reading is 31.7 at a temperature of 63. 
Corrected reading is 31.7 plus .3, equals 32. 
Interpretation of Lactometer Reading. In the chap- 
ter on milk we learned that normal milk has an average 
