^ 



* M»^ 



''•^ 0^ 



i 



e 



I 





nan; 



•*c 



li 



'% 



I 



■ . tliae to lii 



f 



^ 



^ 





Haucii I:: -' 



2!: 



■ appear! 

 .t other n!!' 



of re* ; 



rt 



,u\^ 



Offll 



nil'' 



n* 



/ 





III" 



ti« 



iun 





I: 



HUTTONIAN THEORY. 



343 



dredtli part of the mineral kingdom 



Mr K 



nds. th 



ery 



ftim 



vifible on th 



z, and that the quantity of granite 

 J furface, far exceeds what is here 

 fuppofedf . The queflion is certainly of no mate- 

 rial importance to the eflablifliment of Dr Hut- 

 ton's theory : it is evident, too, that an eftimation, 

 which varies fo much as from a tenth to a hun- 

 dredth part, cannot have been meant as any thing 



precife ; yet it may not be quite fuperfluous to 

 ihow, that the truth probably lies nearer to the leaft 

 than the greated of the limits juft mentioned. 



o6. Though 



forms a part, generally 



Ih 



O 



P 





of all the great chains of 



tains, it ufually occupies a mu 

 furface than the primary fchiil 

 Alps, if a line 



fs ext 



e 



r^-^ 



t of 

 the 



a line be drawn from Geneva to Ivrea, 

 be about eighty-five geographical miles 



gth, and 



meafure the breadth of th 



formidable chain of mountains, at the place of 



greatell 



Now. from the obferv 



in th 



f SaulTu 

 s direclj 



roffed 



Alps exadlly 



• 



It 



ay be colleded, that lefs 



than nine miles of this line, or not above a 

 tenth part of it, in the immediate vicinity of 

 Mont Blanc, is occupied by granite. 



Y4 



307.' In 



* Theory ofthe Earth, vol. i. p. 211 

 f Geol. ElTays, p. 480. 



