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LENS |
Telescope glass |
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PERSPICIL |
An optical glass; a telescope. |
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BINOCULAR |
A binocular glass, whether opera glass, telescope, or
microscope. |
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APERTURE |
The diameter of the exposed part of the object glass of a
telescope or other optical instrument; as, a telescope of four-inch
aperture. |
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DIOPTRICAL |
Of or pertaining to dioptrics; assisting vision by
means of the refraction of light; refractive; as, the dioptric system;
a dioptric glass or telescope. |
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EYEPIECE |
The lens, or combination of lenses, at the eye end of a
telescope or other optical instrument, through which the image formed
by the mirror or object glass is viewed. |
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BINOCLE |
A dioptric telescope, fitted with two tubes joining, so as
to enable a person to view an object with both eyes at once; a
double-barreled field glass or an opera glass. |
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MICROMETER |
An instrument, used with a telescope or microscope, for
measuring minute distances, or the apparent diameters of objects which
subtend minute a... |
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DYNAMETER |
An instrument for determining the magnifying power of
telescopes, consisting usually of a doubleimage micrometer applied to
the eye end of a te... |
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GOLDFISH |
A small domesticated cyprinoid fish (Carassius auratus);
-- so named from its color. It is native of China, and is said to have
been introduced... |