Evaporated Raspberries. 



)37 



naces, one under each tower or stack. There are two long openings 

 into each, to admit the air. The smoke pipes from these furnaces 

 run off across the cellar and discharge into the chimney, which is 

 plainly shown in Fig. 109. Going up stairs, we find the aspect of 

 the stack on the first floor to be that shown in Fig. 112. This is 

 the door through which the trays are placed into the stack. If we 

 raise this door, F W, and look down to the furnace, we see a coil of 

 stove-pipe, P in Fig. 105, over which the air passes on its way up 

 the tower. But before we proceed to an examination of the inside 

 of this tower, let us look more carefully to the arrangements in Fig. 



109.— Evaporator of W. H. Bush, Walworth, Wayne Co. 



1 12. The tray is laid upon the frames A A (one of these is shown 

 at A in Fig. 105), the little door, F, is raised, and the tray is shoved 

 into the stack. Y is a hand-hole, inside of which a thermometer 

 may be hung. W is a large door, fastened by a button at X, to be 

 used whenever the stack is cleaned or repaired. The opening is 

 large enough to admit a man. 



We are now ready to go inside the stack, and we will take Fig. 

 105 as our guide. The stack is 38 feet high, over all, the wall four 

 inches thick with one coat of plaster on the inside, and the shaft is 

 large enough to admit the regulation size of tray, which is forty- 

 nine inches square. A stack of this size holds twenty-five trays. 

 The back wall of the stack is the blank space bounded by the letters 

 O Y S in the diagram A. A side wall is shown in diagonal section 



