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The largest and most magnificent, and intelligent orrery in the British Empire and the only transparent orrery ever yet offered to the public... : Theatre Royal, Haymarket... on Friday evening, March 3, 1820, and every Monday, Wednesday & Friday, during Lent : Mr. Lloyd will give his astronomical lecture illustrated by the dioastrodoxon, or, grand transparent orrery. Public Domain Mark. Source: Wellcome Collection.