72 BUTTER-MAKING. 
the knowledge of the authors. Many attempts have been 
made, and some of the machines now on the market seem to 
be close to practical success. The “Thistle” milking-machine 
was for some time considered a success. The ‘Sharples Pul- 
sating Lactator” is seemingly meeting with some success. 
The Devore-Hoover Cow Milker Co., Waterloo, Iowa, has 
perfected a machine for which great claims are made. 
Fic. 21.—De Schmidt milking-machine. 
All of the above machines are represented by their re- 
spective inventors and manufacturers to do successful work, 
but none of them are yet advertised entensively, which seems 
to indicate that some points are yet lacking before they can 
be successfully operated in practice. Whether a milking- 
machine will ever be perfected which can imitate natures 
methods as closely as the human hands, is a question which 
has yet to be solved. 
