Page:A tour through the northern counties of England, and the borders of Scotland - Volume II.djvu/180

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nufatory here, and at the warehouse of Messrs. Wedgwood and Bierley in London.

A black ware called Basalt es, which receives a glossy polish; will produce fire in collision with 1; will bear the strongest lire without fusion;

��steel ;

will resist every acid; and distinguish the quality

of metals.

A white porcelain biscuit of the finest texture and appearance, called Jasper; taking, from the mixture of metallic calces with its materials, such co- lours as they communicate to glass in fus'on. From this the famous reliefs and cameos are made; the raised parts of fine white, the ground of any co- lour fancy may surest,

A canc-coloi red biscuit porcelain, called Bam- boo; of a smooth, unpolished surface, possessing the same properties as the Basaltes.

A white porcelain biscuit of exactly the same properties and appearance, bating the absence of colour, with the last.

A Terra Coif a, which has the beautiful appear- ance and durability of the Egyptian pebble, gra- nite, and poi-'hvry.

! i J J

A porcelain biscuit of an hardness that defies ^r^, and of a property to resist all acids and cor- rosives; applied chiefly to the manufacture of

chemical vessels.

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