132 



TRAKSACTIONS OF THE 



BartlUfs Patent Hot-air Furnace. 

 Bartlett & Lesley, 426 Broadway, N. Y. 



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The drawing is a perspective view of this furnace, set with a fire arch, B, for 

 burning coal — the brick-M'ork in front being removed to show the construction of 

 the hot-air chambers, and the direction the air travels. JSI, feeder door. N N, 

 doors for cleaning the flues. K, damper, which should always be closed immedi- 

 ately after the fire is kindled. W, water-tank; the door should be bricked in, in 

 front, for inserting it. S, damper in the cold air box, made so as to close when 

 the winds are adverse; and II is a door to open, to admit the air when the damper 

 S is closed. The inside walls should be smoothly plastered, and care should be 

 taken that no mortar falls to clog up the flues or air spaces. The air travels as 

 indicated by anows. The space left between the brick-work and the sides of the 

 furnace should be 14 inches for No. 6, 16 inches for No. 7, 18 inches for Nos. 8 and 

 9, and 20 inches for No. 10, and 24 inches for No. 11. The front and back wall 

 skould lap on to the corners of the furnace about half an inch, then fall back four 

 inches, leaving this space for the air to pass up, so as to secure the front and back 



radiation. 



[^silver medal awarded. 



