The great popularity of these streets in Europe led to attempts to construct similar streets in the United States. This was at first a difficult problem as at that time no bituminous limestone was known in America, and those who attempted to introduce an imitation of an

Laying Asphalt Surface, Terre Haute, Ind. Pavement Laid 1897.

asphalt-surfaced street were forced to use such materials as were available. A number of streets were laid in Washington, D. C, of a sort of bituminous concrete, made of coal tar pitch and broken stone that was laid very thick. Some of these streets are now in existence, more