Füller*sEarth. Recelves a polifh from friäion. l)oes not adbere to the tongue. Feels fomewhat grcafy. Hardnefs, 4, almoft friable. In water it readily falls into powder without confiderable diffufion, or forming a pnlpy ma fs. Some imagine thefe earths fhould froth and lather with water, but though this poffibly may fome- times happen, yet certainly not generally; for Mr. Werner denies this property to the ful’ling- earths of Saxony, Mr. Bergman to that of Hamp- fhite, and Mr. Becker to that of Wefterwalds Mr. Bergman has given an accurate account of the fuller’s earrh of Hampfhire; its colour is brown, with a fcarce perceptible fhade of green and ftreaked with pale yellovvifh veins, with fome flaty appearance. 'Water boiled 011 it for half an hour, though filtered, ftill retains fo niuch ot it as ro diminifh its tranfparency. In this water the l'oiution of marine barofelenite difcovers norhing vitriolic ; but the folution of filver^ does indicate fome traces of marine acid. If this eanh be heated to rednefs, it blackens; but this blacknefs vanifhes in a higher heat’ which fhews it to proceed from fome vegetable or coaly matter. When heated it flightly decrepi- tates, and in a ftrong heat forms a brown fpongv nvals. Heated with microcofmic falt, it at firft etlerye.ces flightly, but afterwards is fcarcely aaed on; borax corrodcs it better, but confumes it llowly. Soda attacks it with confiderable effer- vefcence. By his analyfis it contains 0,518 filex 0,25 argtll, 0,033 aerated calx, 0,037 ca lx of * Werner, Cronft, 182. 4 Bergm. 155. 1 Berl. Beob.20. 1 iron