Author: Barr, William
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SIR,-The publication of Mr. Roberts’s paper* read before the Institution last March gives an opportunity for reconsideration. Coming to it with fresh interest one is able to grasp points missed upon the first encounter. One of the most interesting parts to me was the description of tests made on mild steel and Chromador pillars and followed by proposed pillar stresses for the new steel. But Professor Robertson’s pillar formula contains within itself the necessary adjustment for steels of various yields.
DURING the last ten years, since Turkey adopted the Republican regime and began to model her ideas and ideals on modern Western lines, great progress has been made in all kinds of constructional and engineering work. The most striking activity has been shown in rai1way and road building, though the latter has not yet fully received the attention it justly merits. W. Cramer
0WING to the traffic and to the parapet being in the way, the problem of relating the survey line over a bridge with the line on the road below it cannot usually be solved by setting up a theodolite on the bridge itself. The author has therefore developed the following method and used it successfully at many bridges ranging in span from 40 feet to 100 feet in the course of an extensive survey of electrified railway having a very dense train service. W.P.S. Cockle