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The reflecting circle consists of a circular anodized brass frame, with two wooden handles. A detached U-shaped bracket holds a third handle with a brass-lined threaded hole for a fourth handle. The instrument has three rigidly connected index arms on the
back of the frame, and a double-ended tangent screw and clamping screw on the back of one of the arms. It has three index shades, two red and one green, and three horizon shades, two red and one green. Index- and horizon-glass adjustment is made by screws. Accompanying the circle is a detached magnifier on a swivelling arm, which is... LINK
back of the frame, and a double-ended tangent screw and clamping screw on the back of one of the arms. It has three index shades, two red and one green, and three horizon shades, two red and one green. Index- and horizon-glass adjustment is made by screws. Accompanying the circle is a detached magnifier on a swivelling arm, which is... LINK
Leia (em português) uma introdução à esta nova série de 30 posts aqui.
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