CREAMERY BUTTER MAKING 



35 



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. 13. 

 Lactom 

 eter. 



Fig. 14. Lactom- 

 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 



