Section Liner, A Draftsman's Tool

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“A draftsman’s instrument for ruling parallel lines. It consists of a triangle so attached to a straight-edge that it can be moved back and forth on it a distance predetermined by the adjustment of a set-screw. a, a straight-edge; b, triangle moving on a for a distance determined by the set of the micrometer scale c; d, spring for releasing triangle and keeping it in the end of its slot.” -Whitney, 1889


William Dwight Whitney, PhD, LLD The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1895) 5458


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