7 he Trials of Milking Machines , 1913. 255 
Comments . — Bacteriologically the milk from this machine 
was notably clean, but owing to grave defects in the working 
of the machine it could not be seriously considered. 
Machine P. 
Morning 
Evening 
19th . 
2,500 
600 
20th • . 
7,000 
. 11,000 
21st . 
2,300 
2,320 
22nd . 
4,300 
1,010 
23rd . 
11,400 . 
3,600 
Total 
27,500 
18,530 
Average 
5,500 
3,706 
Average morning and evening combined . . 4,603 
Position according to bacteriological content . . 6th 
Comments . — Bacteriologically the milk obtained was of 
moderate quality. The milk did not pass through any tubes, 
but was collected in an open pail. Although there was no 
possibility of contamination from tubes, the manipulation of 
udder and teats caused the milk to be contaminated by particles 
of dust, hairs, &c., from the cow. 
Machine Q. 
Morning 
Evening 
19th . 
4,600 
2,680 
20th 
2 600 
2,100 
21st 
4,200 
10,000 
22nd . 
10,700 
4,230 
23rd . 
8,300 
2,200 
Total 
30,400 
21,210 
Average . 
6,080 
4,242 
Combined average morning and evening . , 5,161 
Position according to bacteriological content . . 7th 
Bacteriologically the milk was very similar to P. The milk 
passed from the teat cup through a very shorf tube into an 
open shallow tray, whence it was carried by a metal pipe 
forward to the receiver ; on entering the receiver it passed 
through a layer of cotton wool between two gauze strainers. 
The teat cups, gauze strainers and receiver are difficult to clean 
properly, while the open tray caught hairs, dust, &c., falling 
from the udder which, though caught by the strainer, were 
subjected to continued washing by the entering milk. 
