MODE II. KONITE. 435 



is easily cut with any sharp instrument, but 

 does not receive any polish. The fracture 

 is granular and dull; as are also the colours, 

 which are white, grey, and Isabella yellow. 

 The kinds differ greatly in the fineness of their 

 grain, in colours, and duration ; but these dif- 

 ferences only influence their use for distinct 

 purposes, and do not depend upon their original 

 positions. 



" Some have a very fine grain, and a whitish 

 colour; but have little hardness, and cannot be 

 employed except in sculpture. Such are the 

 stone of Tonnerre, in the department of Yonne; 

 and one of those quarried at Nanterre, near 

 Paris; not to mention other examples. 



" Others have a coarser grain, while their 

 colour is yellowish ; and they are tender and 

 friable. Such are the stone of Conflans Ste. Ho- 

 norine, near Paris, of which the beds are some- 

 times two yards in thickness ; and that of St. 

 Leu and Trossy, in the department of Oise; the 

 beds of the latter being only a yard thick. 



" In fine, others, though of a very loose tex- 

 ture, and of a very coarse and visible grain, 

 although even composed of calcareous sand and 

 agglutinated fragments of shells, &c. possess 

 nevertheless great hardness and solidity; such 

 as the stone of Saillancourt, near Pontoise, the 



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