198 ON THE TORBANEHILL MINERAL, ETC. 



versant with the structure and functions of a whale, would foi- 

 a moment suppose it to be a fish, because it inhabits the 

 water and resembles one ; so I contend no histologist, ac- 

 quainted with the structure and properties of the Torbanehill 

 mineral, ought to maintain that it is coal, because it is dug 

 out of the earth and burns in the fire. 



