STANDARD - Survey Instrument Antique Center!

223
No. 15 a.
Alt.-Azimuth .
Alt.-Azimuth, as in cut. Graduations of 5 1A inch circles on solid silver, two
opposite micrometer-microscopes for each circle reading to 10", and by estimation
to 2". Botn circles can be shifted, so as to bring different parts of the graduation
under the micrometer-microscopes. The telescope islO inches long, has an aperture
of 1% inch and a power of 24 diameters. Telescope is provided with a level on top
and with 3 horizontal wires for leveling and for stadia measurements, and if desired
with 5 vertical wires for star observation. The telescope must be reversed in its
bearings by hand. Telescope axis is of hardened steel. The striding and microscope
levels read to 5" of arc. Two ordinary small levels attached to the instrument
serve to place it in an approximate horizontal position. Complete in box.
Price, as above, $58O.OO