TENTH SPECIES* Porcelain Earth. Porzellanerde.—Werner. l*°rcelain clay, Kirw. vol. i, p. 178—Argilla da pored* lana, Nap. p. 348.—Feldfpath argilliforme, Hauy, t. 2. p. 616.—La terre a porcelaine, Broch. t. 1, p. 320. External Characters. Ps colour is generally reddilh white, of various de* 8 r ees of intenfity, which fometimes inclines to yeU I°vvifli and greyilh white. Occurs inaflive and difleminated. Its particles are fine dully. Colours Itrongly. It is flightly cohering, f eel3 line, but pretty meagre. Scarcely adheres to the tongue. 1 <•- 1 -»gllt. , ; Comtituenl
