< Page:Popular Science Monthly Volume 81.djvu
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TRINIDAD AND BERMUDEZ ASPHALTS
25
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:
Photo, C. R. Toothaker, Phila. Commercial Museum.
Loading the Crude Pitch on Cars.
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