450 
excrement per liter was contained in the milk supply of Halle ; Leipzig, 
3.8 milligrams; Berlin, 10.3 milligrams, and Munich, 9 milligrams. 
LThl ® in 1892 showed the great fluctuation in the bacterial content 
of the milk of Giessen. In May, 1892, from 30 examinations he found 
it ranged between 83,000 and 169,600,000; in June the lowest count 
was 10,500 and the highest 13,600,000. The average in May was j 
22,900,000, and the average in June was only 2,900,000. 
Sedg^vick and Batchelder,^ 1892, were the first to record the bacterial 
content of milk from an American city. From a series of examina- 
tions of the milk supply of Boston and its suburbs they report as 
follows : 
City. 
Samples. 
Bacteria 
per cubic 
centimeter. 
City. 
Samples. 
Bacteria 
per cubic 
centimeter. 
Charleston 
8 
4,222,500 
2,778,000 
3,259,600 
Roxbury 
17 
1,874,300 
708, 100 
1,189,800 
South Boston 
9 
North End 
6 
Jamaica Plain 
10 
Back Bay 
These samples were taken directly from the milk wagons and 
planted at once. 
From groceries 16 samples additional were taken which averaged 
4.577.000 bacteria per cubic centimeter. 
Ten samples collected from well-to-do families averaged 1,438,000 
bacteria per cubic centimeter. 
Forty-four samples of the so-called ‘Tailroad’’ milk from one 
dealer averaged 500,000 per cubic centimeter. The extremes were 
5.664.000 and 2,200. 
Another set of ten samples examined on arrival in Boston averaged 
371.000 per cubic centimeter. 
Knochenstiern in 1893 gives the results of examination of milk at 
Dorpat, Russia, between September 18 and January 25, as follows: 
From milkmen 
Village milk... 
Market milk. . . 
Shop milk 
Average bac- 
teria per 
cubic cent- 
imeter. 
10, 200, 000 
12, 000, 000 
25, 000, 000 
30, 000, 000 
o LTil: Untersuchungen der Martmilch in Giessen. Zeit. f. Hyg., vol. 12, 1892, p. 475. 
& Sedgwick and Batchelder: A bacteriological examination of the Boston milk sup- 
ply. Boston Med. and Surg. Journ., vol. 126, 1892, p. 25. 
c Knochenstiern, Hugo: Ueber dem Keimgehalt der Horpater Martmilch nebst 
einigen bacteriologischen Untersuchungen von Frauenmilch. Inaug. Disserta., 
Dorpat. 1893. 51 p. 8°'. 
