. Canadian forest industries 1892-1893. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. FIG. 2. two feet at the top, and from 15 to 20 feet high. These chimneys all possessed an excellent draft, notwith- standing the high arch under which the wood was burned. I then set about the building of the contemplated mill. I made my own plans for the brickwork but was warned and warned again by the bricklayers that my plan would not do. But the work was completed. Fig. 2 shows a side view, and, although not perfect, it will show the shape and style. I will g
. Canadian forest industries 1892-1893. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. FIG. 2. two feet at the top, and from 15 to 20 feet high. These chimneys all possessed an excellent draft, notwith- standing the high arch under which the wood was burned. I then set about the building of the contemplated mill. I made my own plans for the brickwork but was warned and warned again by the bricklayers that my plan would not do. But the work was completed. Fig. 2 shows a side view, and, although not perfect, it will show the shape and style. I will give a few facts that may be of interest to your readers. There were 20 feet of grate bar surface. At the farther end of the boiler the smooth brick pavement was seven inches from the boiler. The chimney at the base inside was 34 inches square; at the top it was 24 inches square, and 53 feet high. We used various kinds of fuel, green sawdust from a sawmill, chips from a planing mill, cordwood, hard and soft coal, coal dust, and other wastes from coal and wood yards. The draft was good, and the results all we desired. Here is the reason for it: first, if you fire a pile of wood the volume of blaze and heat will be greatest just where the flame leaves the wood, then it assumes a cone shape, so the nearer the inside of the chimney comes to fitting the tapering blast; the better will be the draft. If the chim- ney should be too large, or enlarged at the top, the cold air will fall in around the top and small end of the blast and weaken the draft. A ship, to sail lively, must be free from barnacles. Water will run moie rapidly through a smooth box or rough passage. So it is clear that from the grate bars to the top of the chimney the whole way should be made as smooth as possible. The bridge walls are a hind- rance to a draft, and no good. In the successful experiment just given, I placed a sheet of iron at the point where the blast enters the chimney, giving it a downward dash, whic
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectforestsandforestry
