252 The Trials of Milking Machines , 1913. 
Report on the Individual Machines. 
Machine A. 
Bacteriological Content per 1 c.c. 
Morning 
Evening 
19th . 
5,000 
1,260 
20th . 
7,800 
600 
21st . 
1,800 
310 
22nd . 
2,200 
5,460 
23rd . 
2,900 
3,700 
Total 
19,700 . 
. 11,330 
Average . 
3,940 
2,266 
Average morning and evening combined . . 3,103 
Position according to bacteriological content . . 4th 
Comments . — A very good machine because (1) No rubber 
tubing. (2) Short straight celluloid tubes convey the milk 
from the cups to the can : a complete view of the inside of the 
tubes can be obtained. (3) The teat cups cannot fall into the 
litter. 
Suggested. — (1) That the lid be kept on the can when the 
latter is in the cow house. (2) That the internal surface of 
the can be rendered smooth. 
Machines D. and E. 
These two may be considered together as their construction 
is very similar. 
Morning 
B. 
Evening 
E. 
Morning 
Evening 
19th 
700 
730 
3.200 
430 
20th . 
6,400 
300 
2,300 
800 
21st 
2,500 
920 
5,500 
770 
22nd . 
1,500 
540 
1,300 
1,720 
23rd . 
1,100 
1,100 
1,700 
1,500 
Total 
12,200 
3,590 
14,000 
5,220 
Average . 
2,440 
718 
2,800 
1,044 
Average morning and evening combined . 1579 1922 
Position according to bacteriological content 2nd 3rd 
During the trials every possible care was taken of these 
machines, so that bacteriologically the results were good. It 
must be remembered, however, that when used under ordinary 
conditions the machines present the following disadvantages : 
(1) Length of rubber tubing, the inside of which cannot be 
seen ; (2) If the teat cups fall off they suck up dust from the 
floor. 
