EditorialQuadrant, Two almost identical clinometers to measure the maximum slope of a swinging ship. Both are brass, mounted on a wooden back plate with the center of the bow at the top. The scale on the arc runs from 0 ? to 45 ? each side. The outer edge of th...
EditorialTwo Quadrants, Two almost identical clinometers to the maximum slope of a winding ship. Both are brass, mounted on a wooden back plate with the center of the bow at the top. The scale on the arc runs from 0 ? to 45 ? each side. The outer edge of the ar...
EditorialProtractor, Brass conveyor or protractor in a wooden box. The radius of the protractor is 102 mm. The center of the arc is indicated with an iron needle and the instrument has an arm with a vernier on the arc. Two visors can be mounted on the arm. A lo...
EditorialQuadrant, Two almost identical clinometers to measure the maximum slope of a swinging ship. Both are brass, mounted on a wooden back plate with the center of the bow at the top. The scale on the arc runs from 0 ? to 45 ? each side. The outer edge of th...
EditorialDegree arc, Brass degree arc on a long spindle. Protractor shown on one side from 0-90, incomplete., anonymous, unknown, 1850 - 1900, brass (alloy), l 27.8 cm ? w 12.8 cm ? d 11.2 cm.
EditorialProtractor, Brass conveyor or protractor in a wooden box. The radius of the protractor is 86 mm. The center of the arc is indicated with an iron needle and the instrument has an arm with a vernier on the arc., J.M. Kleman & Zoon (mentioned on object), ...
EditorialParallel Rule with Protractor and Plotting Scale, 1796, Made in Newark, New Jersey, United States, American, Brass, wood, Rule: 12 x 1 3/8 in. (30.5 x 3.5 cm), Metal, Lebbeus Dod (1739?1816).