TRINIDAD AND BERMUDEZ ASPHALTS 



2 5 



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

 Loading the Crude Pitch ox Caes. 



Crude Dry 



Tercent. Per Cent. 



Water and gas, volatilized at 100° C 29.0 



Bitumen soluble in cold carbon disulphide 39.0 56.5 



Bitumen retained by mineral matter 3 .3 



Mineral matter, on ignition with tricalcium-phosphate . . 27.2 38.5 



Water of hydration in clay and silicate 3.3 4.2 



98.8 99.5 



Composition of the Asphalt 



An examination of the asphalt shows that it is one of extreme uni- 

 formity in composition. It consists of, according to the most refined 

 methods of analysis, from whatever part of the deposit it is taken : 



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

 Loading the Crude Pitch on Cars. 



