An epitome of astronomy, with the new discovered planets, and the late comet, as illustrated by the eidouranion; or, transparent orrery / originally invented by A. Walker, and as lectured upon by his son, D.F. Walker.

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An epitome of astronomy, with the new discovered planets, and the late comet, as illustrated by the eidouranion; or, transparent orrery / originally invented by A. Walker, and as lectured upon by his son, D.F. Walker. Public Domain Mark. Source: Wellcome Collection.