
842 - -Rerort or THE CHEMIST OF THE 
variable composition of milk, in order to ascertain whether the 3 
laws prescribing a fixed standard of purity for milk are based - 
upon actual facts, since the decision of this point involves the 
question of justice or injustice in the action of the statutes now 
a 
‘ 
in operation. , 
The milk studied represents the mixed morning and evening 
normal milk of numerous herds of cows. Since most dairymen 
who take their milk to cheese factories have their cows come in 
milk in the spring, our data represent the changes due to the 
advance of the period of lactation, modified, to a greater or less _ 
extent, by special conditions, such as food, weather, etc. 
We shall take up this study of the composition of milk under 
the following heads: 
1. Pounds of solids in 100 pounds of milk. 
2. Pounds of solids not fat in 100 pounds of milk. 
3. Pounds of cheese-producing solids Ma and casein) in 100 
pounds of milk. 
4, Pounds of whey-solids (albuffen, sugar, etc.) in 100 pounds 
of milk. 
5. Pounds of fat in 100 pounds of milk. 
Pounds of casein and albumen in 100 pounds of milk. - 
Pounds of casein in 100 pounds of milk. 
. Pounds of albumen in 100 pounds of milk. 
. Relation of casein to albumen in normal milk. 
(10. Relation of fat to casein in normal milk. x 
11. Relation of fat to casein and albumen in normal milk. 
12. General summary of results. 
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