112 



GARDEN AND FARM TOPICS. 



about 14 inches square, and the length of the furnace 

 bars 30 inches ; the furnace should be arched over, and 

 the top of the inside of the arch should be about 20 

 inches from the bars. The flue will always " draw " 

 better if slightly on the ascent throughout its entire 



FIGURE 8. (Scale % of an inch to the foot.) 



length. It shou/d be elevated in all cases from the 

 ground, on flags or bricks, so that its heat may be given 

 out on all sides. The inside measure of the brick flue 

 should not be less than 8x14 inches. If tiles can be 

 conveniently procured, they are best to cover with ; but, 

 if not, the top of the flue maybe contracted to six inches, 

 and covered with bricks. 



After the flue has been built of brick to twenty-five 

 or thirty feet from the furnace, cement or vitrified drain 

 pipe, eight or nine inches in diameter, should be used, as 

 they are not only cheaper, but radiate the heat quicker 

 than the bricks ; they are also much easier constructed 

 and cleaned. Care should be taken that no woodwork is 

 in contact with the flue at any place. It should be taken 

 as a safe rule, that woodwork should in no case be nearer 

 the flue or furnace than eight inches. In constructing, 

 do not be influenced by what the mechanics will tell you, 

 as few of them have any experience in such matters, and 



