The Trials of Milking Machines , 1913. 
245 
similar to other vacuum and pulsator machines. The horizon- 
tal pulsator was mounted on the lid of the receptacle, the 
inlet air being filtered through cotton wool. The apparatus 
was arranged for the simultaneous milking of two cows. The 
indiarubber air and vacuum pipes in this machine were made 
of different sizes, so as to avoid the possibility of error in 
coupling them up. The receptacle was divided by a partition 
so as to keep the milk from each cow separate, the pouring 
arrangement which consisted of a gun-metal screw and cap 
did not, however, commend itself. The price of the complete 
double set of apparatus as exhibited, consisting of the divided 
receptacle, pulsator, air and vacuum tubes, and two sets of teat 
cups, was given as 19 1. 
Manus. This machine depends entirely on mechanical 
pressure applied to the teat ; the milk gravitates to the recep- 
tacle, and is exposed to the air twice during transit. From this 
it follows that the receptacle itself is open to the air. 
Power is transferred from the main shafting to the machine 
by a flexible shaft ; the latter by means of cams actuates 
reciprocating plungers working in guides. The plungers carry 
cross-heads having rubber pads on them, and their motion is 
such that the upper portion of the teat is pressed first, after 
the manner of hand milking. 
The average weight of milk per cow for morning and evening 
worked out at 31 lb. 11 oz., strippings 3 lb., and time Ilf mins. 
Jens Nielsen. Here the inventor relies on mechanical 
pressure only. The cam actuating the teat squeezer being in this 
case on the main shaft the flexible shaft has a reciprocating 
motion, after the manner of the Boden wire. There are two 
of these wires delivering power to the rubber rings which fit 
on to the teats. Each wire is actuated by a separate cam so 
set that the rubber ring closes on the upper portion of the 
teat first and squeezes the milk from it into an open pail, 
which is slung on the cow. v 
Nyehoe and Nissen. In this machine the principle of 
squeezing the teats is adhered to and is obtained by water 
power, the latter being set in motion by a reciprocating pump 
driven from the main shafting. By means of valves the 
pressure is first brought to bear on the rubber ring fixed to 
the upper portion of the teat, which, by this means, is filled 
with milk ; the adjustable spring-loaded valve then opens and 
admits the pressure to the lower rubber ring, squeezing the 
milk from the teat into the receptacle, to which the outer air 
has access. In the final phase of operations the pressure is 
relieved from both rings. 
(Jane. This machine made use of vacuum and pulsator, 
the latter being independent. The teat cups were rubber lined, 
