Publisher's Synopsis
Excerpt from A Treatise on the Progressive Improvement, and Present State of the Manufacture of Porcelain and Glass
Di?'erent Branches of the Art - Ingredients used - Properties of Alu mina - Its Infusibility. - Contraction when exposed to Heat. - \wedg wood's Pyrometer. - Composition of Gama - Great Abundance of Clay. - Properties of Silica - Its great Abundance - Sea Sand - In capable of artificial Solution inwater. - Dissolved naturally. - Springs at Carlsbad - Boiling Fountain in Iceland - Fusion of Silas - Kinds of Clay used in Potteriea - Their various Merits. - China Clay of Cornwall - Mode of its Preparation - Its Analysis. - Cornish Fel span - l ts Fusibility. - Steatite. - Earth of Bandissero. - Its Analysis. -cornish Sopcstone. - Spuma Maris - Its Employment in Porcelain.
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