Chicago : Engineering and Contracting Pub. Co. · leaf 444
. 786,319) was grantedA. F. Shuman for a composite paving block,which has many features of interest. Ac-cording to the specifications forming part ofthe letters patent this block consisted of abase made of timbers placed side by side andsecured together by strips of the same thick-ness spiked to… … Fig. 2—Repairing Worn Blocks by Coating with Bituminous Material. of laying pavements, a patent (No. 132,682)for which was granted in 1872. By this meth-od no flooring of wood or other material wasneeded, the blocks being laid directly on thegraded bed, and then partially imbedded inthe eartli…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
