US$ 10.00
David Jones and John Connolly
began manufacturing Swallow motorcycle sidecars in Blackpool in 1921
The animal is native to South America and is shown in profile
North-east view of the Church of St Leonard
Mirror cell for the Great Melbourne Telescope speculum mb-code RS-10494 David Jones and John ConnollyStudy 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
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