Grade 



Date 



(34) 



EXERCISE 15. 



Object. — To determine the effect of speed of the tester upon the test. 

 Apparatus. — Samples of whole milk-; skimmilk; Babcock test outfit. 

 Step 1. Prepare three test samples of whole milk. 



Note. — In this exercise have all conditions alike except speed. 



Step 2. Prepare three test samples of skimmilk using skimmilk bottles. 

 Step 3. To the skimmilk add a little more than a full measure of acid. Mix 



as usual. 

 Step 4. Run one bottle of whole milk and one of skimmilk at half speed; 



one of each at proper speed; one of each at high speed. 



At the bottom of the page explain — 



1. The effects on the color of the fat. 



2. Other effects of insufficient speed. 



3. Other effects of too much speed. 



