(1):
A telescope in which the medium between the objective and the eye piece is water instead of air, used in some experiments in aberration.
(2):
A telescope devised for looking into a body of water.
(1):
A telescope in which the medium between the objective and the eye piece is water instead of air, used in some experiments in aberration.
(2):
A telescope devised for looking into a body of water.
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