246 
T he Trials of Milking Machines , 1913. 
t 
and were thinner at the top. The machine w r as used in con- 
junction with a releaser plant, Avhich necessitated the milk being 
conveyed through long metallic pipes. These Avere cleaned 
by placing a tight fitting brush, of the bottle-brush type, into 
the pipe and drawing it through by means of the vacuum. 
J. & R. Wallace. This machine differed somewhat from 
the majority of machines depending on vacuum and pulsator in 
that each teat cup carried its own pulsator. The cups and 
liners were rather longer than is usual, and with the pulsators 
weighed 9 lb. per set. The rubber liners were formed in the 
usual manner with flats thinned towards the upper end. This 
machine was a particularly clean stripper. 
Max. This is a vacuum and pulsator machine varying only 
in details from the usual type, the chief difference being found 
in the construction of the pulsator. Rubber tubes are used to 
convey the milk to the receptacle. The teat cups are lined with 
rubber tube, which is slightly stretched. It is claimed that 
by this means it is possible to make one cup to fit any size 
of teat. 
Law 7' ence- Kennedy . This machine was very similar to the 
Yaccar, and worked on the same principle. One slight 
difference was shown, in the method by Avhich the “ calf tongue ” 
action was achieved. The teat cups Avere slotted on one side, 
and a rubber pad was fitted into the slot. The vacuum actuated 
this pad in such a manner that it caused an intermittent 
pressure on the teat. We were informed, at time of the trials, that 
this machine had not yet been put on the market. 
J. Bartram & Go. We understand that this firm is under the 
same agency as the Yaccar and the Lawrence-Kennedy, and 
the system is similar. The pulsator is similar to that of the 
LaAvrence-Kennedy, except that it contains only one differential 
plunger and has a horizontal piston valve made of vulcanite. 
The teat cups are precisely the same as those used in the 
Yaccar. 
During the trials the majority of the competing machines, 
which were worked on the vacuum principle, used the vacuum 
supplied from the plant existing at the farm, the average 
vacuum being from 15 to 16 in, of water. This plant worked 
admirably, and was a great boon to those competitors. The 
Tables showing the Aveight of milk drawn from each batch of 
coavs was ample evidence of the great care arid judgment that 
had been bestowed by Mr. Burkitt in this department. The 
result of these trials, coupled Avith the fact that machine milking 
has been in successful practice for a long period at Grange Hill 
Farm, leaves no doubt that the milking machine is noAv a 
practical implement, which, without being injurious to the cows, 
will save time and labour, in addition to ensuring greater purity 
