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LABORATORY MANUAL 
Questions: (1) What is meant by the term “control sample” when we 
refer to testing milk for total solids? 
(2) What is the legal standard for SNF of cow’s milk? 
(3) What effect on the lactometer will the addition of preservatives 
have? How may this difficulty be overcome? 
(4) How does the New York board of Health lactometer differ 
from the Quevene? How may the readings of one be converted 
to those of the other? 
References: F. & W. If 114, 117, 127; Van S. pp. 175—188; Jud. pp. 91—101; 
St. pp. 136-143. 
