3° 



THE POPULAR SCIENCE MONTHLY 



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Photo. W. H. Rau, Philadelphia. 

 Piee at Brighton, Trinidad, from Shore. 



It consists, like all the other more or less solid native bitumens, of 

 components of two different classes, which can be separated by solvents ; 



.*">-•■- 



■ IHii IK B 





"V' * -, 





*+^%, 



a . 





mm 



, 



jRP» .;'.". 



Photo, C. R. Toothaker, Phila. Commercial Museum. 

 Titch Cones on Edge of Trinidad Lake. 



