Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 95
375 /T///! I \\\\\^l }f m y. Mechanical Movements. 91 367. A parallel ruler with which lines |may be drawn at required distances apart jwithout setting out. Lower edge of upper |blade has a graduated ivory scale, on whichthe incidence of the outer edge of the brassarc indicates the width between…
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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