652 TRANSACTIONS OF SECTION M. 
Lady Talbot Milk Institute. 
Table showing number of micro-organisms per cubic centimetre (machine 
milking) :— 
site 911 1912 
| February . -|) 9,000 «|. 5,300 
| March : ; : 3 . | 29,600 21,200 | 
April . é 5 - ' . . | 25,400 31,300 
| May . E ‘ a : : ; | 3,600 11,600 
| Average . x 2 é | 23,800 18,700 
Table showing average of micro-organisms per cubic centimétre after 
deleting the figures for the sample yielding the highest count each month. (This 
table gives a better idea of the bacterial condition of the bulk of milk supplied 
by the Institute.) 
— |, aa 1912 | 
Rbbraat yell cemivey bu tetoey| alee 2,500 
| sete Pate aie EE WES Sd 14 BOO 4,100 
Armenia sal cel? terete Ui! wee | 4e20/800 8,000 
aay Sete ele pire a Nae 2 Gail 97 128,000 9,900 
Average * S20) Ui ais + Saebo an 
| 
Experiments conducted at the farm proved the superiority of the machines 
over hand milking as regards cleanliness. 
3. Trials of Milking Machines. By Dr. R. Srennousre W1iLuLIAMs, 
J. Goupine, and James MAckINTOSH. 
At the trials of milking machines arranged by the Royal Agricultural Society 
of England in 1913, the chemical and bacteriological tests were conducted by 
the authors. Eleven machines competed, and the paper discussed the various 
lines of development along which future progress may take place. 
At the outset it may be stated that the Committee excluded syphon machines 
on the ground ‘ that they were rightly considered by the Society to be injurious 
to the cows.’ 
There remained then two types of machine :— 
A. Pressure machines, those in which an attempt was made to simulate the 
process of hand milking, and 
B. Suction machines, those in which suction in one form or another was 
employed. 
Of the former three competed. The bacteriological results were as follows :— 
O P Q 
675 4,603 5,161, 
which represents the average bacteriological content per c.c. during the trials. 
Remarks on Pressure Machines. 
O. Squeezing the teats from above downwards. No friction on udder. Milk 
caught in open pail. 
P. Squeezing of teats by rubber plates associated with adjustable shields 
which massaged the udder during milking, thus dislodging hairs and dirt 
particles. Open bucket underneath the udder. 
Q. The milk was expressed by pressure only and conveyed by short channels 
to an open tray, thence by a tube to the receiver which is suspended underneath 
the cow. As it enters the receiver the milk is strained. 
