Natural History
M. MEYERSTEIN, Gottinger
细节
M. MEYERSTEIN, Gottinger
A lacquered-brass goniometer, the vertical circle with silvered scale, twin verniers numbered I and II, tangent screw and clamp and twin magnifiers with reflectors, the inner-circle and axis rotated by large, knurled hand-wheel, supported by tapering column, the axis with counter-balance weights, additional fine tangent screw adjustment with vertical screw lock, the steel blade on swinging mount, the T-shaped cast-iron base with tapering pillar-mounted telescope with azimuth mount, fine adjustment screw, sighting wire adjusters, internal focusing, bubble level and cross bubble on three adjustable feet -- 10¼in.(26cm.) high
A lacquered-brass goniometer, the vertical circle with silvered scale, twin verniers numbered I and II, tangent screw and clamp and twin magnifiers with reflectors, the inner-circle and axis rotated by large, knurled hand-wheel, supported by tapering column, the axis with counter-balance weights, additional fine tangent screw adjustment with vertical screw lock, the steel blade on swinging mount, the T-shaped cast-iron base with tapering pillar-mounted telescope with azimuth mount, fine adjustment screw, sighting wire adjusters, internal focusing, bubble level and cross bubble on three adjustable feet -- 10¼in.(26cm.) high
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See illustration front cover