Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 56
of the samematerial as the crucible or glass-pot. He made a hollow cylinder of fire-clay of the same height asthe crucible, closed at its lower extremity and open above, with a flat ledge all round of severalcentimetres in width. Having heated this cylinder red-hot, he placed it in the melted… … giving the bar a horizontal rotary motion. For the manufacture of flint-glass, and of crown-glass,he adopted a circular furnace, in the centre of which is placed the crucible or glass-pot, all the partsof which are exposed to the same temperature; and covered crucibles are adopted, because…
Mechanical engineering -- Dictionaries
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