COOLING, STORING, AND SHIPPING MILK. we 
the milk in the can was about the same as in the ordinary milk can, 
No. 6. 
Comparing the time required for milk to rise in temperature from 
44° to 50° F. with the ordinary can (No. 6), it will be found to be 
10.7 times as long in can No. 1, 13.3 times in can No. 2, 4 times in 
can No. 3, 54 times in can No. 4, and 2.7 times in can No. 5. i ne 
eas of some sort of sasriiefion for milk cans is apparent when 
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—NOTES ~ , 
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ACU RN 
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ID 350 65 FO 85 9S joo 
TIME — HOURS. 
Fic. 17.—Efficiency of various types of cans for holding milk. Room temperature, 
99.5° F. 
milk is to be shipped considerable distances and reach its destination 
at a temperature below 50° F. This last experiment illustrates very 
well the rise in temperature which may be expected when milk is 
allowed to stand in the sun during very hot weather. Instances in 
which cans of milk are left for acral hours without shelter or other 
protection either on the roadside or at the milk-receiving station, 
are too common to need comment. 
