' 
166 STORRS AGRICULTURAL EXPERIMENT STATION. 
City averages about 250,000 bacteria per cubic centimeter. 
During cool weather about 2,000,000 and during hot weather 
about 5,000,000.’’ 
Slack* found that out of 2,394 samples of Boston milk, 42 
per cent. showed a germ content of less than 100,000 bacteria 
per cubic centimeter; 29.75 per cent. was between 100,000 
and 500,000; 9.75 per cent. between 500,000 and 1,000,000; 
12.75 per cent. between 1,000,000 and 5,000,000; and 5 per 
cent. above 5,000,000. ‘These counts were made during June, 
July, August, and September. ‘The results of these tests show 
that 71.75 per cent. of all the samples taken contained a germ 
content below the Boston legal limit of 500,000 bacteria per 
cubic centimeter, while 27.50 per cent. were above this limit. 
These figures represented the milk as it reached the city of 
Boston. 
Conny found by a study of the milk delivered in the city 
of Middletown that the germ content of twenty-seven samples 
taken from different milkmen showed an average of 266,400 
bacteria per cubic centimeter. The lowest number found in 
any sample was 8,100 and the highest 2,973,800. 
Hellensf found by a study of market milk sold in Helsing- 
fors that the milk contained ‘‘ during the summer from 20,000 
to 34,300,000 bacteria per cubic centimeter, the average being 
4,745,000, while in the winter the bacteria content ranged from 
70,000 to 18,630,000, and averaged 2,111,000. About 60 per 
cent. of the summer samples contained from 1,000,000 bacteria 
per cubic centimeter against 35 per cent. in the winter sam- 
ples.”’ 
In a series of studies || of the market milk sold in the city of 
Guelph, Harrison found that the germ content ranged from 
I21,000 to I,200,000 per cubic centimeter. At the same time 
the milk produced at the College dairy ranged from 8,000 to 
18,000 per cubic centimeter. 
Out of 291 samples§ of milk purchased in the open market 
of Chicago during April, May, and June, 1904, Jordan found 

* Am. Journal of Public Hygiene, Nov., 1904. 
t+ Report of Storrs Experiment Station, 1902-3, p. 76. 
{O. V. Hellens, Nord. Mejiri Tidn., 14, 1899. 
| Ontario Agricultural and Experiment Farm Report, 1896. 
¢ Health and Sanitation Committee of the Civic Federation of Chicago, 1904. 

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