The subliming apparatus consists of two parts: (I) a hemispherical stoneware basin placed within a closefitting iron one, or an enamelled iron basin, and (2) a hemispherical lead or stoneware lid, or dome, cemented on the top of the basin to prevent leakage.
The roasted mineral, slightly moistened, is introduced into a vat made of stoneware or pitched planks, and furnished with a double bottom.
This salt is also formed by dissolving tin in strong hydrochloric acid and allowing it to crystallize, and is industrially prepared by passing sufficiently hydrated hydrochloric acid gas over granulated tin contained in stoneware bottles and evaporating the concentrated solution produced in tin basins over granulated tin.
For detailed accounts of his life see Eliza Metyeard, Life of Wedgwood (1865-1866); Jewitt, Life of Wedgwood (1865); Rathbone, Old Wedgwood (1893); Church, Josiah Wedgwood: Master-Potter (1894; new ed., 1903); Burton, History and Description of English Earthenware and Stoneware (1904); J.
It consists of a stoneware tank with a thin sheet of platinum-iridium alloy at either end forming the primary electrodes, and between them a number of glass plates reaching nearly to the bottom, each having a platinum gauze sheet on either side; the two sheets belonging to each plate are in metallic connexion, but insulated from all the others, and form intermediary or bi-polar electrodes.