Chicago : Engineering and Contracting Pub. Co. · leaf 294
ing. Rows of stones areplaced on both sides of the road bed andserve as walls in conjunction. Adjoining therows of stone and running lengthwise of theroad are shallow drains, which serve to catchthe sand or other fine material which may bewashed from the higher portion of the roadbed while the… … Fig. 8—Sketch Showing Method of UsingWood Key. the renewal of old street pavement. The in-vention consists in breaking up the worn outbrick or stone block pavement into fragmentsby means of a heavy spiked roller and causingit to be sufficiently split and broken up toleave a rough, cellular, but…
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