Grade 

 Date. . 



EXERCISE 10. 



(27) 



Object. — To determine the specific gravity of milk. 



Apparatus. — Lactometer; lactometer cylinder; thermometer, and sample 



of milk. 

 Step 1. Thoroughly mix sample of milk and regulate temperature between 



60° and 70° F. 

 Step 2. Fill cylinder nearly full of sample of milk. Place lactometer in 



sample and observe exact reading on lactometer after it has become still. 



Caution. — Care is necessary to not let the lactometer drop in the 



cylinder, as the lactometer is very easily broken. 

 Step 3. Record exact temperature of sample and lactometer reading. 

 Step 4. Test sample by Babcock method for fat content. 



Lactometer. 



Lactometer cylinder. 



