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| | Joseph Leconte, 1823-1901. Instructions for the Manufacture of Saltpetre |
 | | The general conditions necessary to the formation of saltpetre are: 1st, the presence of decaying organic matter, animal or vegetable, especially the former; 2d, an alkaline or earthy base, as potash or lime; 3d, sufficient moisture; 4th, free exposure to the oxygen of the air; and 5th, shelter from sun and rain. |
 | | But where saltpetre is manufactured on a large scale, as in the saltpetre plantations, many such beds are made and symmetrically arranged, so as to economize space; all under the same roof, with regularly arranged drains, all leading to a large cistern. |
 | | One part crude saltpetre, four parts common salt, and one-half part charcoal, are mixed and thrown gradually in a red-hot crucible, or else heated in an iron spoon, until reaction ceases. |
| docsouth.unc.edu /imls/lecontesalt/leconte.html (4164 words) |
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