EVAPORATED M1ILK—STERILIZING 137 
Sterilizers—The predomi- 
nating apparatus used for ster- 
ilizing is a huge. boiler-like, 
hollow, iron cylinder or box. 
It opens either at one end 
or on the side. Its interior 
is equipped with a revolving Fig. 58. 
framework, steam inlet with a Sterilizer for evaporated milk 
perforated steam distributing 
pipe in the bottom of the steril- 
izer and extending over the entire length of the sterilizer, a water 
Courtesy of Arthur Harris & Co. 
exhaust, a water inlet with a water distributing pipe in the 
top of the sterilizer and running the entire length of 
the sterilizer and a water exhaust. The sterilizer carries on its 
exterior a steam gauge, a vacuum eauge, a water gauge, a blaw- 
off valve and a high-temperature thermometer (registering to 
about 280 degrees F.). In some makes of sterilizers the interior 
frame-work does not revolve on its axis, but moves back and 
forth by means 
of a direct-act- 
ing, steam- 
driven — piston. 
attached to the 
back end of the 
sterilizer. ‘The 
purpose. of 
keeping the 
cans in motion 
while heat is 
applied, is to 
heat the con- 
tents rapidly 
and uniformly, 
and to prevent 
the evaporated 
milk from bak- | 
ing onto the 
sides of the Fig. 59. Sterilizer for evaporated milk 
j ‘ourtesy of The Engin in a 
cans. A. still Courtesy of The Engineering Company 
