and are all connected. The steam cylinders are melting the glass, a large cistern furnace heated by gas. An were built by Earle Brothers, of Hull, fifteen years ago, and each 8J inches diameter, with 24 inch stroke; the pumps have accident occurring rendered it necessary to withdraw the the… … grit, sand, or other foreign matter. They are really independent of that prin- The valves, which are also of gun ciple, and better results would have been CRYSTALLIZATION OF GLASS. metal, are laced with india rubber at- got by the use of two simple cylinders, tached with copper screw.bolts. We may…
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![An illustration from Medical zoology and mineralogy. Or, Illustrations and descriptions of the animals and minerals employed in medicine, and of the preparations derived from them; including also an account of animal and mineral poisons, with figures coloured from nature / [John Stephenson]. (1832)](https://img.insideoutlibrary.com/img/200/wellcome-wellcome_b22010932-355-6.webp)
