B. - High-duty Apparatus.
1. Machines for Sugar-Works.-Fig. 132 represents
the blowing and exhausting machine used in the large German sugar-works
for injecting carbonic acid into the defecating apparatus. The
air-cylinder is in line with the steam-cylinder, the piston-rods
being connected and guided as shown. The diameter of the air-piston
varies according to the power of the machine from 17.5 to 31.2
inches, the stroke generally being equal to the diameter. The
revolutions vary from 35 to 60 per minute. The valve-mechanism
is clearly shown in the engraving.