ohn- (as we have previously had an example of it apropos taken into consideration the special conditions in son Company, it was decided to apply the process to a of the welding of rails) from a continuous current which the tracks of tramways are established, being tramway line that had been laid… … the welding apparatus. employ the dynamos and mo- Fig. 4.-CAR fOR WELDING TRAMWAT RAILS IN PLACE The alternating current is tors that effect the lighting of produced by the transforma- the works, through the aid of tion of the 500 volt continuous current led from the special transformers calculated…
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