194 



TOBACCO LEAF. 



will hold between 700 and 800 sticks, or from 4200 to 

 4800 plants. 



Flues are variously arranged. The illustration 

 given in Fig. 39 shows the arrangement most commonly 

 used. Two holes are cut in one end of the barn, 36 

 inches wide and some three feet high. These openings 

 must be 18 to 20 inches from the side walls of the barn, 

 as at e e e e in Fig. 39. Brick or stone is used for 

 the furnaces, which are built with walls 18 inches apart, 

 20 inches in hight at the openings, a a, and arched. 

 The spaces above the arches are closed with brick and 





FIG. 49. PATENT VENTILATED BARN, WISCONSIN. 



mortar. These furnaces project on the outside 18 

 inches, and are extended on the inside some three feet. 

 The lateral walls of the furnaces should be extended 

 around from b to c and covered with sheet iron. At 

 c c, flues made of iron pipe 10 to 12 inches in diameter 

 are inserted, with a gentle inclination upward, so as to 

 insure draught. They come out of the barn two feet 

 higher at d d than they are at c c. No. 16 sheet iron 



