Details
J. Kern Aarau
a late 19th century brass plane table surveying level, signed on the quadrant J KERN. AARAU, the telescope with rack and pinion focusing, cross-wire adjustments, lens hood, located by twin clamps with graduated bubble level, the quadrant with silvered scale and single vernier, with fine tangent screw adjustment and clamp, the axis supported by a -frame from the parallel rule - 21¼in. (54cm.) long; with additional bubble level with elevation adjustment and a trough compass in fitted pine case with iron mounts - 23¾in. (60.3cm.) wide
a late 19th century brass plane table surveying level, signed on the quadrant J KERN. AARAU, the telescope with rack and pinion focusing, cross-wire adjustments, lens hood, located by twin clamps with graduated bubble level, the quadrant with silvered scale and single vernier, with fine tangent screw adjustment and clamp, the axis supported by a -frame from the parallel rule - 21¼in. (54cm.) long; with additional bubble level with elevation adjustment and a trough compass in fitted pine case with iron mounts - 23¾in. (60.3cm.) wide