ft Theory of the Earth. 151 



for example, that thefe blocks were tranfported to the tops 

 «f the mountains ? 



CHAP. IX. 



On Mountains in general. 



1. To confider whether a mountain be infulated, or whe- 

 ther it forms part of an affemblage of mountains connected 

 with each other in the form of groups or chains. 



2. If it be a group, to determine its form anddimenfiom, 

 and the manner in which its parts are conne&ed. 



3. If it be a chain, to determine its direction, its breadth, 

 and its extent ; whether it be fingle or compound j and, in 

 the latter cafe, the nature and difpofition of the partial chain* 

 which enter into itscompofition. 



4. If a mountain be infulated or confidered feparately from 

 its chain, or the group of which it forms a part, to determine 

 its form, its height, and other dimenfions. 



5. To determine the form and fituation of its fummit or 

 ftioft elevated part; thofe of its declivities and bottom. 



6. The fituation of its precipices in regard to the fea and 

 the neareft plains, valleys, and mountains *. 



7. Its nature, and the kind of ftone of which it is compofed. 

 Whether it be homogeneous ; that is to fay, of the fame na- 

 ture throughout all its parts ; if it be not, to determine the 

 dimenfions of its different parts. 



8. Whether it confifts of indivifible maffes, or maffes di- 

 vided by ftrata. 



9. Whether it contains mines either in veins or ftrata: 

 the nature of thefe mines. 



10. Toobferve the height at which the fnow is perpetual, 

 or what Bouguer calls the lower limits of the fnow, and the 

 height at which trees, (h rubs, and plants, with difiincl flow- 

 ers, ccafe to grow. Thefe obfervations have been negle&ed 

 in the northern countries. 



• And in regard to the four cardinal points ; whether any fide is more 

 fteep than another, and which fi« } C. 



h 4 "• To 



