then were only granite spheres—the art of cast-ing iron balls not being known. It is capable of tak- ing in an iron ball of 796 Sis. weight, but it is notsufficiently strong to withstand the full charge ofmodern gunpowder with a solid iron shot, or even aniron shell. It is kept in Edinburgh as an… … lulely without smoke, under all conditions. Ourpages bear ample evidence of the great amount of ef-fort which is being devoted to this task, and we aimto record every considerable step which is made to-ward its accomplishment. Petroleum may be burn-ed for illuminating purposes in lamps, without…
Patents · Combination · Claim · Manner · Iron · Coal · Purpose · Address munn · Olefiant gas · Coal gas · Patent office · Purpose set · Igniting point · Explosive mixtures · Steam hammer · Scientific American · Carbonic oxide
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