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 59
ings are provided with mouth pieces of plate iron. E is adoor-way in the side of the kiln: its sill is three feet above the Fig. 3. … ground; its width is two feet, and its height five feet sixinches. This door is used for the introduction of the seggarswithin the kiln, after which it must be securely walled up. Fis a square hole, of which there are three in the entire cir-cumference. These are designed for the introduction of…
Porcelain · Glass manufacture
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![An illustration from Io. Bap. Portae Neopolitani de distillatione lib. IX : quibus certa methodo, multipliciq[ue] artificio, penitioribus naturae arcanis detectis, cuius libet mixti in propria elementa resolutio, perfectè docetur (1608)](https://img.insideoutlibrary.com/img/200/ia-iobapportaeneopo00port-39-28.webp)
