7 Min« Suppry 
wat 
(es) 
route wagons or by rail, cards similar to Figure 11 may be 
mailed to the patrons. ‘he evidence is so conelusive that even 
the niost obstinate patron cannot help admitting his euilt and 
ean usually be induced to “clean up. 
MILK CONDENSING COMPANY 
SEDIMENT CARD 
Name | 
=| 
| 
\ 
ADDRESS \ 
eens { 
DATE 
No 
THIS 1S THE AMOUNT OF DIRT IN 
ONE PINT OF YOUR MILK 
Bie LA 
Fermentation Tests. 
rapid determination of the kind of bacteria with which the milk 
‘hese tests are of great value in the 
from individual patrons is contaminated. Glass tubes are filled 
one-half full of milk from each patron. ‘These tubes are set in 
a constant water bath at 100 degrees I’. and the changes which 
milk undergces are noted alter six, twelve and twenty-four hours. 
A solid curd with a clear whey indicates that lactic acid 
bacteria are the chief organisms and that the milk has been 
produced under cleanly conditions, These organisms are killed 
when the milk js heated in the hot wells. Such milk therefore 
is safe, unless it contains excessive acid, as shown by acid test. 
A curd with gas holes, or that which is torn to pieces in the 
tubes, shows the presence of gas-producing germs. These come 
largely from manure and other filth. Among these are Bacillus 
coli communis, the natural inhabitant of the colon of the animal, 
and butyric acid organisms which are spore bearers. ‘The latter 
especially may give rise to serious milk defects, causing ‘swell 
Ss 
