THE HEDGEHOG TRAIN.
Have you seen the hedgehog strain? Its real name is the template machine. You may see it crawling along, generally near to a tunnel, for its work lies in the smoky tunnels of our railroads/ You will know it readily/ for it is a_ stout iron vehicle with spikes radiating all over it. Each of these spikes, is connected by electricity to the interior mechanism,. and as the hedgehog runs slowly through the tunnel every obstacle is met by one or other of them and its exact place noted, so that th® gangs may go and remove it. Protruding plates on the lower frame find obstructions. on the track also, so that following trains are certain of the necessary clearance I above and below.
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Taranaki Daily News, 6 August 1932, Page 7 (Supplement)
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127THE HEDGEHOG TRAIN. Taranaki Daily News, 6 August 1932, Page 7 (Supplement)
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