Mirror cell for the Great Melbourne Telescope speculum Anonymous
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Mirror cell for the Great Melbourne Telescope speculum
Study of the system of "equilibrated levers" made by Thomas Grubb (1800-1878), devised for the Armagh Cassegrain telescope and applied to the Great Melbourne Telescope's twin speculum mirrors.
Original: albumen print. ca. 1867
- Image reference: RS-9291
- The Royal Society
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