that at the two extremi- to each other and clamped together by the clamps used to tion in the distance, while in the foreground it is in signal- ties of asame diametral plane, the thicknesses of the sleeve secure the wire to the posts. ing position, having been operated by the approaching differ by… … opposite the fixed index, and then the box of the sliding arm is fixed in such a way that its index is opposite a di- vision of the scale, and that the distance of the arms exceeds ing the panels are all secured in place either on the flat or below the railroad rails parallel with the cross-ties,…
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