114 



This substance is dark brown, has rather a greasy ap- 

 pearance, scarcely sticks to the fingers, and looks nearly 

 like the dark or dirty coom of cart-wheels, and as it were 

 lies about the divisions of the Septarium, or in the holes of 

 the other specimens. Smell, when a little heated, as usual 

 to the Mineral Bitumens ; by some thought agreeable, 

 though very different from Vegetable Tar. Breaks easily 

 with a rugged fracture; burns with much smoke; is not 

 soluble in Spirits of Wine. 



Mineral Tar and Pitch are found in various states in the 

 islands of Trinidad and Barbadoes*, but I do not know 

 that any elastic Bitumens are found there. 



* See Mr. Hatchett's admirable account in the Transactions of the Lin- 

 nean Society. 



