THE CUL'rUEE OF THE GRAPE. 37 



which should be set in the masonry in building. The 

 grate endures the heat from the anthracite coal better if 

 cast in separate pieces, half an inch thick, and two and 

 a-half inches deep, with two spaces of about an inch in 

 length, at proper distances from the ends, where the 

 thickness is three-fourths of an inch, the ends, also, being 

 of this size. The sides of the fire-place must be built of 

 fire brick-, the top must be covered, also, with tile, or 

 brick of this material, if coal is to be used. The tile on 

 the top should be covered with one or more courses of 

 brick. My furnaces have five or six, to retain and pre- 

 vent too great escape of the heat. In the cut, the top of 

 the furnace is represented as arched ; this is not neces- 

 sary, but it may slope from the front to the back, where 

 it enters the flue, three or four inches, with benefit to the 

 draft. At the further end of the furnace, the flue should 

 commence, and should have a rising of certainly two or 

 three feet from the grate, to insure a good draft ; the flue 

 should run to the front of the house, and thence along 

 this, at the distance of twelve inches from the wall. This 

 flue should be of brick, carefully made, to prevent the 

 escape of smoke or gas ; it may be eight to ten inches 

 square on the outside, or it may be fourteen inches wide, 

 and eight inches deep, and covered with tiles ; either 

 answers perfectly well. If the house is a very small 

 one, — less than twenty feet, — the flue may return on the 

 back of the house, and the smoke be carried off by the 

 chimney near the furnace. If the house is over twenty 

 feet in length, the better way will be to continue it around 

 the end to the- back wall, and up by a chimney out of 

 the roof, as represented in the cut of the lean-to house. 



