Page:Popular Science Monthly Volume 81.djvu/31

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25
TRINIDAD AND BERMUDEZ ASPHALTS
 

PSM V81 D031 Loading the crude pitch on cars 1.png

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

Loading the Crude Pitch on Cars.
 
Crude
Per Cent.
Dry
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 uniformity in composition. It consists of, according to the most refined methods of analysis, from whatever part of the deposit it is taken:

 

PSM V81 D031 Loading the pitch on cars 2.png

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

Loading the Crude Pitch on Cars.