THE TRANSPORTATION OF MILK 



197 



every case the milk was hauled about 15 miles, an uncovered wagon being 

 used in 1910, and a covered one in 1911 and 1912. On Aug. 23, 1910, 

 he took the temperatures of 20 samples from twenty 10-qt. cans coming 

 from the different dairies and on July 27, 1911, and July 23, 1912, under 

 similar atmospheric and other conditions he again took temperatures and 

 samples of the 10-qt. cans of these same dairies. The counts, Table 

 60 shows, were markedly lower in 1911 and 1912, when the tempera- 

 tures of the milk were held between 44 and 46F., than they were in 1910, 

 when the temperature ranged from 56 and 64F. 



TABLE 60. TEMPERATURE AND BACTERIAL COUNT OF THE MILK OF 20 DAIRIES IN 



SPRINGFIELD, MASS. (GAMBLE) 



To show where the increase in the bacterial count between the farm 

 and the consumer takes place, Gamble made a bacterial count of samples 

 of milk drawn from 10-qt. cans in the milk tanks at 18 different farms. 

 Each can was marked and after it had cooled lJ/ hr. in the tank of the 

 city dealer it was again sampled. The 18 cans were then poured over and 

 from each one of them a quart bottle was filled. These 18 quart bottles 

 were then handled in a routine way along with the other milk then being 

 bottled preparatory to being loaded on the delivery wagons and delivered 

 to consumers, and they were delivered and exposed to the air along with 



