A Treatise on the Progressive Improvement and Present State of the Manufactures in Metal, المجلد 1

الغلاف الأمامي
Longman, Rees, Orme, Brown, and Green, 1831 - 341 من الصفحات
 

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الصفحة 155 - Now there was no smith found throughout all the land of Israel : for the Philistines said, Lest the Hebrews make them swords or spears...
الصفحة 2 - And a river went out of Eden to water the garden ; and from thence it was parted, and became into four heads. 11 The name of the first is Pison : that is it which compasseth the whole land of Havilah, where there is gold; 12 And the gold of that land is good : there is bdellium and the onyx stone.
الصفحة 155 - So it came to pass in the day of battle, that there was neither sword nor spear found in the hand of any of the people that were with Saul and Jonathan: but with Saul and with Jonathan his son was there found...
الصفحة 30 - Every six days they call a founday, in which space they make eight tun of iron, if you divide the whole sum of iron made by the foundays : for at first they make less in a founday, at last more. The hearth by the force of the fire, continually blown, grows wider and wider, so that...
الصفحة 29 - The hearth, or bottom of the furnace, is made of sandstone, and the sides round, to the height of a yard, or thereabout ; the rest of the furnace is lined up to the top with brick. When they begin upon a new furnace they put fire for a day or two before they begin to blow.
الصفحة 80 - Loop they take out with their shingling tongs, and beat it with Iron sledges upon an Iron plate near the fire, that so it may not fall in pieces but be in a capacity to be carried under the hammer. Under which they then removing it, and drawing a little water, beat it with the hammer very gently, which forces cinder and dross out of the matter, afterwards by degrees...
الصفحة 152 - It has been said by some engineers, that the wrought-iron exfoliate, or separate, in their laminae, on that part which is exposed to the pressure of the wheel. This I pointedly deny, as I have closely examined rails which have been in use for many years, with a heavy tonnage passing along them, and on no part are such exfoliations to be seen. Pressure alone will be more destructive to the cohesive texture of castiron than to that of wrought-iron.
الصفحة 4 - An iron river rolls along the plain. The witty huntsman, musing, thither hies, And of the wonder deeply 'gan devise. And first perceiving that...
الصفحة 41 - ... is therefore now plastered up with a mixture of wet soil and sand, except the top row of bricks, which is left unplastered all night. Next morning, when the charge has been in twenty-four hours, this is completely closed also, but the chimney remains open till the flame is gone, which is generally quite off in twelve hours more.
الصفحة 152 - ... in the effects of the rubbing or friction of the wheel. All the particles of malleable iron, whether internal or superficial, resist separation from the adjoining particles with nearly equal forces. Cast-iron, however, as is the case with other bodies of similar formation, is both harder and tougher in the exterior part of a bar, than it is in the interior. This, doubtless, arises from the more rapid cooling of the exterior. The consequence is, that when the upper surface of a castiron rail is...

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