Chicago : Engineering and Contracting Pub. Co. · leaf 272
even if the topof the corrugations becomes much worn, there elastic or yielding material—as pine, cypress,or cedar, or of felt of paper saturated withtar—were fitted, after which the shellwas filled level to the edges of the rim with aconcrete of cement and sand, cement sand and bed, 1, the surface… … screened gravel, artificial stone, or asphalt andscreened gravel. A section of pavement con-structed with these blocks is shown in Fig. 12.In 1890 a patent was granted to Gottlieb Fig. 4. will still be sufficient space between the corru-gations to receive the calks of the horses shoe.There will be…
Buildings
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