26 



BULLETIN 744, U. S. DEPARTMENT OF AGRICULTURE. 



after it had traveled about 10 miles from the farm ; the milk in the 

 can covered with a ^-inch felt jacket reached 60° F. after approxi- 



55 ss 



Tir~l£-HOUf*X. 



Fig. 19. — Relative efficiency of 4 types of cans in shipment of milk from Washington, 

 D. C. to New Orleans. Milk cooled to 44° F. and hauled 13 miles in open truck to 

 station. 



mately 268 miles of travel ; the milk in the can covered with a 1-inch 

 felt jacket reached 60° F. after 332 miles, and that in the insulated 

 can after 650 miles. The average air temperature during the journey 



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Fig. 20. — Relative efficiency of 4 types of cans in shipment of milk from New Orleans 

 to Washington, D. C. Milk cooled to 40° F. and loaded directly at railroad station. 



was 80° F. Compared with the ordinary can, the -J-inch jacketed 

 can allowed milk to be shipped 26 times as far before it reached 60° 



