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I look upon it as one of the most important discoveries ever made, and take the liberty of recommending thee and earnestly requesting thou wouldst take out a patent for it immediately.... The specification of the invention will be comprised in a few words, as it will only set forth that a reverberatory furnace being built of a proper construction, the pig or cast iron is put into it, and without the addition of anything else than common raw pit coal, is converted into good malleable iron, and, being taken red-hot from the reverberatory furnace to the forge hammer, is drawn out into bars of various shapes and sizes, according to the will of the workmen."
His work in glass manufacture at least gave him considerable experience in the problems of fusion under high temperatures and provided some support for his later claim that in applying the reverberatory furnace to the manufacture of malleable iron as described in his first patent of January 1855, he had in some manner anticipated the work of C. W. Siemens and Emil Martin. Ibid., p. 108 ff.
The pens having been dried are placed in other cylinders, and polished by mutual friction, produced by reverberatory motion. They are then roasted or annealed, so as to procure the requisite temper and colour, whether bronze or blue. The last process is that of slitting, which is done by women, with a sharp cutting tool.
Gravity on his surface being 28 times stronger than on the earth, a piece of timber would be as heavy as gold there, and a stone let fall would drop 460 feet the first second instead of 16 feet as here. He is built of the same kind of matter as the earth and other planets, but is hotter than the hottest electric arc or reverberatory furnace.
For a length of 1,240 feet we perceive on one side a series of rolling machines, and on the other a row of reverberatory furnaces that occasionally give out a dazzling light. In the intervals are fiery blocks that are being taken to the rolling machines, in order to be given the most diverse forms, according to the requirements of commerce.
He first set up his crucible upon the bridge of the reverberatory furnace used for melting pig-iron, and filled it with a mixture carefully compounded according to the formula of the books; but, notwithstanding the shelter of a brick, placed before it to break the action of the flame, the crucible generally split in two, and not unfrequently melted and disappeared altogether.
The furnace is fired with coal on a grated hearth, built at the lower end; it is more economical both in fuel and in labour than an ordinary reverberatory furnace. The Thwaite-Denny Revolving Furnace. This new type of furnace, which is fired with gaseous fuel, is stated to combine the advantages of the Stetefeldt, the Howell-White, and the Bruckner.
The ores in this furnace should therefore be fed in at the colder end of the hearth and be gradually worked or "rabbled" forward to the firing end. One disadvantage of the reverberatory furnace is the fact that it is impossible to avoid the incursion of air during the manual rabbling action, and this tends to cool the furnace.
Thus, like the Craneges, he employed the reverberatory or air furnace, without blast, and, like Onions, he worked the fused metal with iron bars until it was brought into lumps, when it was removed and forged into malleable iron. Cort, however, carried the process further, and made it more effectual in all respects.
The tendency to run became general, and from little excited groups here and there came the sounds of cheering. He stopped and listened over the cold country whistles were blowing and the chimes of the Garden City churches broke suddenly into reverberatory sound. Anthony began to run again.
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