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Page:Popular Science Monthly Volume 81.djvu/188

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ceeds from Westminster to the city. This serves as a striking evidence of the ability of Trinidad asphalt to resist dampness and to carry heavy travel in such a climate and in such a city as London, without deterioration.

I may further illustrate the uses of Trinidad and Bermudez asphalt by citing bituminous broken stone surfaces which have been constructed with these asphalts in Massachusetts and in the State of New York, which have been in use for at least three years, and have given the greatest satisfaction, the most striking feature of these roads being that the bituminous binding material is not drawn to the surface by the hot summer sun, but remains in the road where it is placed, with the greatest stability. Surfaces of this kind have furnished the most satisfactory service tests which are at present available, of a bituminous broken stone construction.