Iron: An Illustrated Weekly Journal for Iron and Steel Manufacturers, Metallurgists, Mine Proprietors, Engineers, Shipbuilders, Scientists, Capitalists ..., Volume 65

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Perry Fairfax Nursey
Knight and Lacey, 1856
 

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Página 179 - Engineering. THE HANDBOOK OF OPTICS. New Edition. Edited by T. OLVER HARDING, BA 298 Illustrations. Post 8vo, 5^. cloth. " Written by one of the ablest English scientific writers, beautifully and elaborately illustrated."— Mechanics
Página 153 - ... temperature of the metal, while the diminished quantity of carbon present allows a part of the oxygen to combine with the iron, which undergoes combustion and is converted into an oxide. At the excessive temperature that the metal has now acquired, the oxide as soon as formed undergoes fusion, and forms a powerful solvent of those earthy bases that are associated with the iron ; the violent ebullition which is going on mixes most intimately the...
Página 152 - ... carbon cannot exist at a white heat in the presence of oxygen without uniting therewith, and producing combustion ; that such combustion would proceed with a rapidity dependent on the amount of surface of carbon exposed ; and lastly, that the temperature which the metal would acquire would be also dependent on the rapidity with which the oxygen and carbon were made to combine...
Página 152 - At one side of the vessel, about half way up from the bottom, there is a hole made for running in the crude metal, and on the opposite side there is a tap-hole stopped with loam, by means of which the iron is run out at the end of the process. In practice this converting vessel may be made of any convenient size, but I prefer that it should not hold less than one, or more than five tons, of fluid iron at each charge.
Página 154 - ... or flaws, and its greater cohesive force and elasticity as compared with the blister steel from which it is made, qualities which it derives solely from its fusion and formation into ingots, all of which properties malleable iron acquires in like manner by its fusion and formation into ingots in the new process.
Página 185 - CE, which is the distance from the centre of the earth to the centre of the moon.
Página 154 - ... tons of materials at a time, giving out ten tons of fluid metal at a single run. The manufacturer has thus gone on increasing the size of his smelting furnaces, and adapting to their use the blast apparatus of the requisite proportions, and has by this means lessened the cost of production in every way. His large furnaces require a great deal less...
Página 6 - PETITJEAN'S process consists essentially in the preparation of a solution containing oxide of silver, ammonia, nitric, and tartaric acids, able to deposit metallic silver either at common or somewhat elevated temperatures; and in the right application of this solution to glass, either in the form of plates or vessels.
Página 79 - ... and the grinding improved ; and this part of my invention relates only to sucking away the plenum of dusty air forced through the stones, and not to employing a sufficient exhausting power to induce a current of air between the mill- stones without a blast, this having before been practised as above mentioned.
Página 7 - ... silvering of a plate, and two or three cases of repair were performed on the table. The proposed advantages of the process are, — the production of a perfect reflecting surface ; the ability to repair ; the mercantile economy of the process (the silver in a square yard of surface is worth 1*.

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