Zenith Telescope

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“The instrument is supported on a strong tripod, fitted with levelling screws; to this tripod is fixed the azimuth circle and a long vertical steel axis. Fitting on this axis is a hollow axis which carries on its uper end a short transverse horizontal axis. This latter carries the telescope, which, supported at the center of its length, is free to rotate in a vertical plane. The telescope is thus mounted excentrically with respect to the vertical axis around which it revolves.” — Encyclopedia Britannica, 1893


The Encyclopedia Britannica, New Warner Edition (New York, NY: The Werner Company, 1893)


TIFF (full resolution)

1009×2400, 296.0 KiB

Large GIF

430×1024, 48.8 KiB

Medium GIF

269×640, 24.9 KiB

Small GIF

134×320, 9.0 KiB