HUTTONIAN THEORY. 



183 



^lii, 



I 



'}' 



\ 



f 



s 



1, 



at ii 

 irtliti 



eon 



R'itl' 



[tit 

 oiitl 



» U'^J 



w 



1 "■ 





/ 



m the bowels of the earth. This impoffibility 

 is precifely what he fuppofes ; and yet Mr Kir- 

 wan's arguments are direded, not againft the 



ftence of 



m 



th 



of the 



rth 



but againft the exiflence of burning and inflam- 

 mation. 



After taking notice''^, 



that SaufTure had fuc 



ceeded, thoudi with extreme difficulty 



ing a particle of limeft 



fible 



ly with a 



ne, fo fmall as to be vi^ 

 fcope, ** what (adds he) 



muft have been the heat neceflary to melt whole 



mountains of this matter ? Judging by all that 

 we at prefent know of heat, fuch a high degree 

 could only be produced by the pureft air, admg 

 on an enormous quantity of combuftible matter. 



Now, E 



obi 



e 



d. that the 



mbultion 



of two hundred and eighty cubic inches of 

 ading on charcoal, was not able to 



fiffed 



fulion 



f 



e g 

 app 



of C 



ble 



from 



all the air in th 



inofDhere, nor in ten 



fpl: 



uld not 



Angle mountain of this fubftance, of any 

 even if there were a fufficient quantity 



extent, even 



of inflammable matter for it to ad upon 



Tudg 



g alfo of fubterraneous heat by what we kn 



of that of volcan 



no fuch heat exifts : the 



liighefl. they in general produce, is that requi- 

 lite for the fufion of the volcanic glafs called 



M4 



obfidian, 



« 



Geol. Eflajs, p. 453, 



