PRODUCTION OF SIRUP FROM SWEET POTATOES. 
11 
(Fig. 8). The tank was 5 feet in diameter and 4 feet deep and had 
a capacity of approximately 550 gallons. The outlet to the filter 
press was 1J inches. 
The tank, mounted on a platform about 18 inches high, was 
clamped securely to the platform by four J-inch iron rods, so 
shaped as to fit over the top edge of the tank. The tank was also 
equipped with a mechanical agitator. On the agitator shaft, a steel 
bar 1| inches in diameter, were placed four sets of paddles made of 
2 by 2 inch oak stock with one face cut down like a propeller to 
give a good stirring action. Two sets were made to throw the sirup 
toward the bottom of the tank and two sets were made to throw the 
sirup upward. In this manner the thrusts set up by the paddles as 
they came in contact with the sirup neutralized one another. To 
fasten the paddles to the shaft, a hole lf\ inches in diameter was 
bored where the two paddles in one set overlapped. The paddles 
were then placed in position on the shafting and clamped to the 
shaft by means of four three-eighths-inch bolts. 
The agitator was driven by a beveled pinion and gear, ratio 1 to 4, 
giving the agitator a speed of 22 revolutions per minute. 
FILTER PRESS. 
After the cooling 
operation the sirup 
was filtered in an 18- 
inch, 18- frame, lug 
feed, outside d e - 
livery, cast-iron fil- 
ter press (Fig. 8). 
Twill cloths were 
used in conjunction 
with kieselguhr as a 
filtering medium. 
The rectangular 
catch tank was made 
of 24-gauge galva- 
nized iron, 6J feet 
long by 2 J feet wide 
by 12 inches deep. 
The filtered sirup 
was stored in this 
tank until it was to 
be evaporated, when 
it was pumped to the 
evaporator. 
FLAVORING AND BOTTLING 
KETTLE. 
For flavoring the 
sirup or for putting- 
it in bottles a steam- 
jacketed copper ket- 
Fig. 7. — Type of evaporator which gave satisfactory re- 
sults in concentrating the wort and the filtered sirup. 
