. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . FRONT VIEW OF A PEXNSYLVAMA BLAST FURNACE. headed at the other—both well hardened and tempered ; the scraper,a small iron rod with a hook on one end, to take the bore-meal out of 112 loco:motive sketches. the hole ; and a copper needle, which is a simple %Yire one-fourth of aninch thick, somewhat tapered at one end. The iamping-bar is a barof round iron, with a groove to fit the needle. The erection of a furnace is a very complicated and hazardous TEETICA
. The pictorial sketch-book of Pennsylvania, or, Its scenery, internal improvements, resources, and agriculture, populary described . FRONT VIEW OF A PEXNSYLVAMA BLAST FURNACE. headed at the other—both well hardened and tempered ; the scraper,a small iron rod with a hook on one end, to take the bore-meal out of 112 loco:motive sketches. the hole ; and a copper needle, which is a simple %Yire one-fourth of aninch thick, somewhat tapered at one end. The iamping-bar is a barof round iron, with a groove to fit the needle. The erection of a furnace is a very complicated and hazardous TEETICAL SECTION OF A MODERN CnAECOAL FURNACE. The stack is always a piece of splendid masonry, requiring the mostcompact and heat-resisting stones. The engraving on page 111 exhibits IRON MANUFACTURE. 113 a front view of a furnace stack, as they are ordinarily built—there beinglittle difference in their external appearance, between charcoal and an-thracite furnaces ; this figure exhibits the prominent features of furnaces are built upon one general principle, but varymaterially in size and appearance, as well as in their interior struc-ture, according to the kind of ore and fuel, and similar circumstancesgoverning their operations. The interior of the furnace-stack is linedwith a wall of fire-brick, or else with fire-grained white sandstone,both of which are well adapted to resist the extraordinary heat to whichit is exposed. The lining is situated a few inches from the mainstack, the space between being filled in with fragments of stone, sand,and occasionally coarse
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Keywords: ., bookcentury1800, bookdecade, booksubjectminesandmineralresources
