Chicago : Engineering and Contracting Pub. Co. · leaf 606
in the ground, the centerof a brass cap is the bench mark; stone posts6 ins. square and 4 ft. long set as above areused at points to which they can be trans-ported by rail; brass discs and copper boltsare placed on masonry of a permanent char-acter, on buildings, etc. The distance betweenpermanent… … roads, the most direct and accessible routes.Where permission can be obtained from therailroad officials two velocipede cars are usedby the party while going to and from workand during the actual progress of the leveling. The method of field procedure is as follows:On reaching the point where the…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
