A treatise on the origin, progressive improvement, and present state of the manufacture of porcelain and glass (1832)
[Porter, George Richardson], 1792-1852. [from old catalog] · Philadelphia, Carey & Lea · leaf 129
g together equal to that of the large furnace,they are made to contain as great a number of pots, and of thesame size, as were formerly employed; while the internal areaof the two, being together equal to only one half that of the fur-nace for which they are substituted, the pots are… … It is said, that the weekly expenditure of coals has beenlessened, by means of this alteration, to the extent often chal-drons. The dimensions of the crucibles and furnace should bearsome relation to each other. If the former, from their diminu-tive size, are much below the efficiency of the…
Porcelain · Glass manufacture
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![An illustration from Johannis Kunckelii, churfürstl. Brandenb. würcklich bestallt-geheimden Cammer-Dieners, Ars vitraria experimentalis, oder, Vollkommene Glasmacher-Kunst : lehrende, als in einem ... commentario über die ... sieben Bücher P. Anthonii Neri von Florenz, und denen ... Anmerckungen Christophori Merretti ... (so aus den Ital. und Latein. beyde mit Fleiss ins Hochdeutsche übersetzt) die allerkurtz bundigsten Manieren, das reineste Chrystall-Glas, alle gefärbte oder tingirte Gläser, künstliche Edelstein oder Flüsse ... zu machen ... : sampt einem II. Haupt-Thiel, so in drey unterschiedenen Bücher und mehr als 200 Experimenten bestehet, darinnen vom Glasmahlen, Vergulden und Brennen ... Türckisch Pappier, [et]c. ... und viel andere ungemeine Sachen zu machen, gelehret werden : mit einem Anhange von denen Perlen und fast allen natürlichen Edelsteinen .. (1679)](https://img.insideoutlibrary.com/img/200/ia-johanniskunckeli00kunc-376-153.webp)
