Page image from bound volume which has the following bibliographic description: vi, 162 pages, 5 leaves of folded plates : illustrations ; 18 cm
Huygens, Christiaan, 1629-1695. "The celestial worlds discover'd : or, Conjectures concerning the inhabitants, plants and productions of the worlds in the planets, title page." (1722) Rice University: http://hdl.handle.net/1911/78801.
Huygens created one of the first accurate pendulum clocks, which opened the door to determining equations of time directly thereby helping science involving planetary theory. He also discovered the nature of the rings of Saturn.
Translation of Kosmotheoros sive De terris coelestibus earumque ornatu conjecturae
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