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Alvan Clark 5-in. Refracting Telescope - Alvan Clark 5-in. Refracting Telescope This telescope is one of the eight telescopes built for the US Naval Observatory's expedition to observe the transits of Venus in 1874 and 1882. Built by Alvan Clark and sons in Cambridge,Massachusetts, this particular telescope (no. 856) was used in Vladivostok, Siberia, in 1874, and in San Antonio,Texas, 1882.
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Alvan Clark 5-in. Refracting Telescope - Alvan Clark 5-in. Refracting Telescope This telescope is one of the eight telescopes built for the US Naval Observatory's expedition to observe the transits of Venus in 1874 and 1882. Built by Alvan Clark and sons in Cambridge,Massachusetts, this particular telescope (no. 856) was used in Vladivostok, Siberia, in 1874, and in San Antonio,Texas, 1882.