THE ALCOHOL TEST IN RELATION TO MILK. 
19 
of great importance we have examined a number of samples of market 
milk which had been held for a number of days. 
In Table 15 are shown the results of the examination of four samples 
of market milk. One was raw milk and the others were pasteurized. 
Each bottle of milk was obtained from a different dairy and was held 
in a refrigerator at a temperature of about 9° C. The acidity and 
alcohol test were determined daily and bacterial counts were made on 
the first day and again when the 68 per cent alcohol gave a positive test. 
It is evident from the results obtained that the alcohol test (68 per 
cent) does not show the freshness of milk. The samples were held 
from 8 to 13 days at 9° C. before the alcohol test became positive, and 
during that time the bacteria had increased to more than 100,000,000 
per cubic centimeter. 
Table 15. — Effect on the alcohol test of holding milk at 9° C. 
Davs 
held. 
Raw milk. 
Pasteurized milk A. 
Acid- 
ity. 
Alcohol test. 
Bacteria 
per cubic 
centimeter. 
Acid- 
ity. 
Alcohol test. 
Bacteria 
per cubic 
centimeter. 
75 
per 
cent. 
68 
per 
cent. 
44 
per 
cent. 
75 
per 
cent. 
68 
per 
cent. 
44 
per 
cent. 

1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
1.72 
1+V.S. 
+v. s. 
+v. s. 
4-V. S. 
- 
— 
8,200 
::::;::: 
— 
— 
— 
37, 000 
"""i.*88" 
1.95 
2.02 
+V. S. 
+V. s. 
- 
— 
+ S. 
+s. 
- 
- 
1.78 
1.88 
1.93 
2.08 
2.43 
2.72 
+ M. 
+ L. 
+ L. 
+M. 
+ L. 
- 
2.30 
2.48 
2.75 
+ L. 
+ L. 
+ L. 
+M. 
+ L. 
+ L. 
+L. 
242,000,000 
146,000,000 
626,000,000 
Days 
held. 
Pasteurized milk B. 
Pasteurized milk C. 
Acid- 
ity. 
Alcohol test. 
Bacteria 
per cubic 
centimeter. 
Acid- 
ity. 
Alcohol test. 
Bacteria 
per cubic 
centimeter. 
75 
per 
cent. 
68 
per 
cent. 
44 
per 
cent. 
75 
per 
cent. 
68 
per 
cent. 
44 
per 
cent. 

1 
2 
3 
1.74 
+M. 
+ L. 
+ M. 
+M. 
- 
— 
182,000 
- 
- 
- 
133,000 
1.75 
4 
5 
6 
7 
8 
9 
10 

~"i'.88' 
""2. 66" 
2.10 
2.38 
+M. 
+M. 
+M. 
+M. 
+M. 
+ L. 
+M. 
+M. 
+ L. 
- 
+M. 
+ L. 
+ L. 
+k 
+ L. 
4-L. 
4-M. 
145, 000, 000 
2.12 
2.34 
2.77 
221,000,000 
6.50,000,000 
11 
12 
2.45 
+ L. 
+ L. 
+M. 
700,000,000 
13 
14 

See footnote under Table 1. 
