16 
LABORATORY MANUAL 
Observations: 
Sample 
Treatment 
% fat 
Color 
Condition 
1 
a 
Normal 
b 
“ 
2 
a 
Heated to 110° 
b 
“ 
3 
a 
cc. ether added 
b 
“ 
Conclusions: 
Questions: (1) Give the composition of milk of the four principal breeds 
of cattle. 
(2) Name the leading breeds of cattle which produce milk with rela¬ 
tively small fat globules; with relatively large fat globules. 
(3) What special precautions should be observed when using a 
hand tester in a cold room? How may these difficulties be over¬ 
come? 
(4) How may churning of small samples of milk in transit be 
avoided? 
References: F. & W. ^ 30, 31; Van S. pp. 1-23; Jud. p. 30, 45; St. pp. 
41-45, 132. 
