15 



of buying any expensive apparatus. 

 Get as many shot-gun cans, 8 

 inches in diameter and 22 inches 

 high, holding 40 Ibs. each, as may 

 be needed. Place them in an ob- 

 long boiler (Fig. 3), made to order 

 if necessary. Get a suitable tank 

 for cooling, and a stirrer (see Fig. 

 Fig- 3. 3). That is all there required. 



I acknowledge, however, that if money and steam is at command, 

 it is less work to use some special apparatus than to keep four or five 

 cans stirred by hand, yet part of this gain is counterbalanced by the 

 increased labor in keeping the apparatus clean, and at present I know 

 of nothing better for small quantities than common shot=gun cans. 



