1. In 1906-a tower with dome for Zeiss double astrograph . 2. For astrophotography an astrograph on a separate socket is available. 3. It boasted of an 8 " Cooke Astrograph and a 15 " Grubb refractor telescope. 4. The move was supervised by the precision engineering company, who also manufactured an astrograph and a meridian circle. 5. Tombaugh used the observatory's 13-inch astrograph to take photographs of the same section of sky several nights apart. 6. After its minor planet discoveries at the observatory using its 50-centimeter " Cavagna Telescope ", a Ritchey Chr�tien astrograph . 7. As the main instrument of the observatory, an astrograph was ordered to Carl Zeiss Jena in Germany on December 11, 1935. 8. The Boyden Station of Phoebe, an outer moon of Saturn, by William Henry Pickering using photographic plates captured with the Bruce Astrograph . 9. One well-known case of an astrograph used in a discovery is Clyde Tombaugh s discovery of the dwarf planet Pluto in 1930. 10. Tombaugh used Lowell Observatory's ( 3 lens element ), f / 5.3 refractor astrograph , which recorded images on glass plates.
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