TOBACCO BARNS AND SHEDS. 207 



into two divisions of 12 feet each. It is four stories 

 high and has four tiers four feet in width each side 

 of the center walk, making eight tiers in all. In the 

 center, between the two sections, is a driveway of 12 

 feet. Midway between the second and third stories is 

 an inspection walk, 18 inches wide, the length of the 

 building, with a door at each end, which enables one to 

 inspect the condition of the upper tiers. The building 

 is perfectly air-tight, with no ventilating doors, but 

 ventilation is furnished by the air shafts between the 

 hanging tobacco ; by the vertical air shaft in center 

 of building its whole length ; by the air distributers in 

 each section, with pipes connecting them with funnels 

 outside of the house ; a rotary turret on the roof, with 

 double vanes for upward or downward draft ; arrestors 

 to be hung in the center if each section to force an 

 upward draft, and by outside ventilating doors at the 

 bottom, to admit air. Arrangements are made for venti- 

 lating the different rooms independent of each other. 

 We believe only one such barn was ever constructed, but 

 there are some suggestive features about it. 



A Balloon Frame Tobacco Barn is shown and de- 

 scribed at Fig. 53, that can be put together with simply 

 a hammer and saw, no mortising is required, and yet it 

 will stand the severest cyclone. Long, narrow windows 

 along the bottom, just above the sills, are advised by Mr. 

 Chapman, also a big window in each gable and three 

 cupolas, 4x4, with slats to keep out rain and inside shut- 

 ters to exclude air when necessary. This barn, 34x64, 

 will hold about three acres, requires 22,000 shingles and 

 17,000 feet of lumber. It has no loose poles inside to be 

 lost, or to expose men to bad falls by a misstep when 

 hanging tobacco. 



