..., for relaying gangs or bridge gangs. One of the most interesting tools was the Kango D electric hammer, with a special head for tamping crossingwork. The rapid vibration of the hammer had the effect of interlocking and thus consolidating the ballast. An example of machines steered by an operator was the small...

... aftera week. As ex- plained above, this would becrippling to traffic through Polhill tunnel, and therefore usewasmade of a Matisa petrol-driven sleeper-tamping machine (Fig. g), whichwas kindly lentby Mr. J. Taylor Thompson, M.I.C.E., Engineer of the North-EasternRegion. This machine is manned by one...