. A treatise on steel : comprising its theory, metallurgy, properties, practical working, and use. MWWWM lilWH 1 llll«lirl m ||»llOillPH ||||llll!IH!li!liii| gm« I I %> hi;,;.;,:;. FILES. 263 and might be advantageously modified. It consistsof a fireplace where pit coal is employed, and oftwo or three tiers of muffles. The whole height is 2metres. The grate bars are metre above thefloor, and receive the fuel by a lateral opening, in frontof which is a platform for the coal. This platformbeing a little above the grate bars, the workman hasonly to push the fuel, when the fire requires a
. A treatise on steel : comprising its theory, metallurgy, properties, practical working, and use. MWWWM lilWH 1 llll«lirl m ||»llOillPH ||||llll!IH!li!liii| gm« I I %> hi;,;.;,:;. FILES. 263 and might be advantageously modified. It consistsof a fireplace where pit coal is employed, and oftwo or three tiers of muffles. The whole height is 2metres. The grate bars are metre above thefloor, and receive the fuel by a lateral opening, in frontof which is a platform for the coal. This platformbeing a little above the grate bars, the workman hasonly to push the fuel, when the fire requires a freshsupply. 439. The first tier of muffles is metre abovethe grate bars; the other tiers are metre distantfrom each other. The whole apparatus (ash pitand foundations excepted) is not over metrehigh, so that the workman has no difficulty inwatching the interior of his muffles. These muffles are so disposed, that the upper onescorrespond to the empty spaces between the lowerones, as may be seen in the figure. The flametherefore, by raising, envelops every muffle alter-nately,to the last. The depth of the furnace is ; the front wall has round apertures l
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Keywords: ., bookcentury1800, bookdecade1860, bookidtreatiseonst, bookyear1868
