METHODS OF EVAPORATION. 



331 



Plate XXXn. 



PORTABLE EVAPORATOP— FURNACE AND PAX. 

 For the smaller pans, Xos. 2, 3, and 4, portable furnaces are provided. These are 

 made of cast iron and sheet iron, heavily bound and riveted, strongly made, and the 

 whole mounted upon rockers of angle iron— thus furnishing a complete portable 

 furnace of iron and brick, combined in one, ■with ali the advantages of both, and yet 

 so light that it can be easily handled by two men. This is the most convenient 

 arrangement for small home operations; and, for custom ■work, it is well nigh indispen- 

 sable. With it the operator can move from field to field, or from farm to farm, and thus 

 avoid the labor and expense of hauling the cane. 



