id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
43297	Searle, Alfred B. (Alfred Broadhead)	The Natural History of Clay			.txt	text/plain	38625	1850	61	in a scientific sense to include a variety of argillaceous earths (Fr. _argile_ = clay) used in the manufacture of bricks, tiles, pottery and to mean that clays contain water in a state of combination similar to boulder clays it frequently forms a large portion of the stony material. oxide) is the most useful form in burned clay, but in the raw material true clay present in the material, and reaches its highest proportions will it form a strong material when mixed with a plastic clay. When heated moderately, clay forms a porous material and, unless the clayworkers mix non-plastic material such as sand or burned clay with In Great Britain, china clay occurs in the form of powdery particles clay without the addition of any material other than sand and water.] of sand-like material may be removed from some brick-clays whilst a ball	./cache/43297.txt	./txt/43297.txt