U: 



"fc 



^ 



5,;, 



f 



k 



IT If 1 "-■ 



ht 



HUTTONIAN THEORY. 



321 



to the quartz, fo that the latter is imprefTed both 

 '\ with the acute and obtufe angles belonging to 



the rhombic figure of the former. 



The 



angu- 



4 



4 



lar pieces of quartz thus moulded on the felt- 



1 



'3ti! fpar, and ranged by means of it in rows, give 

 ifcj to this ftone the appearance of rude alphabetical 



# • 



C|; wntmg. 



Now, Dr Hutton argued, that fubftances pre- 

 cipitated from a folution, and cryftallizing at 

 liberty, cannot be fuppofed to imprefs one ano- 

 ther in the manner here exemplified ; and that 

 they could do fo only when the whole mafs ac- 

 I quired folidity at the fame time, or at the fame 

 time nearly *. Such firaultaneous confolidation 

 I can be produced in no way that we know of, 

 r but by the cooling of a mafs that has been in 



fufion 



88. A 



g 



brought from D 



by 



* 





M. Patrin, and defcribed by him in the Journal 

 dePhyfique for 1791, p. 295, under the name of 

 pierre graphique, feemed to Dr Hutton to have 

 fo great a refemblance to the granite of Portfoy, 

 that he ventured to cor 

 fame Hone, and as both containing qua 

 moulded on feltfparf. It Ihould feem, ho 



fider them both 



X 



ever. 



* Theory of the Earth, vol. i. p. 104. 



t Tranf. Royal Society Edin, vol. iii. p. 83. 



