Chicago : Engineering and Contracting Pub. Co. · leaf 446
slag or cinders, a board flooring, andan upper course of wood blocks placed with thefiber in a vertical position. No. 201,171. Improvement in Joints for Side-walks. Henry B. Dyer, Toronto, Ont., in-ventor; patented March 12, 1878; applicationfiled Jan. 7, 1878.Under this invention the sleepers and… … Fig. 7—Plan View of Blocks Under Jenni-son System. No. 204,414. Improvement in Wood PavementsHugo Akerhielm, Chicago, 111., inventor,patented June 4, 1878; application filed July14. 1877. Under this invention the blocks were treatedwith a solution made preferably as follows: 1V4part of…
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