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| | A Chemical Analysis of some Calamines. By James Smithson. |
 | | of this calamine dissolved in dilute vitriolic acid with a brisk effervescence, and emitted 9.2 grs. |
 | | The smallness of these calamine crystals, and a want of sharpness, rendered it impossible to determine their form with certainty; they were evidently, however, rhomboids, whose faces were very nearly, if not quite, rectangular, and which were incomplete along their six intermediate edges, apparently like Fig. |
 | | The water is most probably not an essential element of this calamine, or in it in the state of, what is improperly called, water of crystallization, but rather exists in the crystals in fluid drops interposed between their plates, as it often is in the crystals of nitre, of quartz, andc. |
| www.sil.si.edu /Exhibitions/Smithson-to-Smithsonian/calamine.html (2894 words) |
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