...nickel, copper, and perhaps iron, beneath. This latter, when carefully roasted in an oxidizing furnace, in contact with sand or ground flint, affords at once...of the ore fusible; and, without this, no iron can beprocured by the ordinary process. In roasting lead ore, lime cannot be dispensed with. In copper-...

...impure silicate of cobalt and arseniuret of nickel—two marketable products. The Cornish ores, frjm their metallic poverty, will not undergo the first...procured by the ordinary process. In roasting lead ore, lirne cannot be " These facts serve in some measure to explain, though we cannot allow (hat they in...

...nickel, copper, and perhaps iron, beneath. This latter, when carefully roasted in an oxidizing furnace, in contact with sand or ground flint, affords at once...spirit of enterprise for which Britain is, in most tilings, justly celebrated. In the manufacture of iuon, limestone is used to render the alumina and...

...from their metallic poverty, will not undergo the first fusion necessary to »eparatc the siliceous matrix of the mineral ; and this trifling impediment...silica of the ore fusible; and without this no iron can he procured by the ordinary process. In roasting lead ore, lime cannot be dispensed with. In copper...

...from their metallic poverty, will not undergo the first fusion necessary to Repárate the siliceous matrix of the mineral ; and this trifling impediment...manufacture of iron, limestone is used to render the nlumina and silica of the ore fusible ; and without this no iron can be procured by the ordinary process....

...from their metallic poverty, will not undergo the first fusion necessary to «parate the silicioue matrix of the mineral ; and this trifling impediment...indomitable spirit of enterprise for which Britain i« in moet things justly celebrated. In the manufacture of iron, limestone is used to render the alumina...

...siliceous matrix of the mineral; and this impediment seems actually to have defeated our smelters. In t lie manufacture of iron, limestone is used to render the alumina and silica of the ore fusible ; an.l without this no iron can be procured by the ordinary process. In roasting lead ore, lime cannot...

...impure silicate of cobalt and arseniuret of nickel— two marketable products. The Cornish ores, frjm their metallic poverty, will not undergo the first...by the ordinary process. In roasting lead ore, lime casvaaX \«. dispensed with. lu copper-making not only lime, bat aba floor spar, is frequently needed;...

...impure silicate of cobalt and arseniuret of nickel — two marketable products. The Cornish ores, frjm their metallic poverty, will not undergo the first...no iron can be procured by the ordinary process. In roasfmg lead ore, lime cannot be :i--. ,* V dispensed with. In copper-making not only lime, but also...