Eye-end sentence example

  • The eye-end of the tube is closed by a metal plate having a small hole at its centre near the intersection of the glass plates.
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  • These screws are turned from the eye-end by bevelled wheels and pinions, the latter connected with the handles a', b'.
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  • There is also a position circle, attached at m to the eye-end, provided with a slide to move the eye-piece radially from the axis of the telescope, and with a micrometer to measure the distance of an object from that axis.
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  • An arrangement, afterwards described, has been fitted in modern heliometers for placing the screen in front of either segment by a handle at the eye-end.
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  • It permits complete rotation of the tube and measurement of all angles in reversed positions of the circle; the handles that move the slides can be brought down to the eye-end, inside the tube, and consequently made to rotate with it; and the position circle may be placed at the end of the cradle next the eyeend where it is convenient of access.
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  • They provided a splendid, rigidly mounted, equatorial stand, fitted with every luxury in the way of slow motion, and scales for measuring the displacement of the segments were read by powerful micrometers from the eye-end.
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  • We believe the first important equatorials in which the declination was read from the eye-end were the 15-in.
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  • The declination circle reads from the eye-end, and four handles for clamping and slow motion in right ascension and declination are situated near the observer's hands.
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  • The eye-end carries the micrometer with an illuminating apparatus similar to that described under Micrometer.
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  • The lamp near the eye-end illuminates the field or the wires at pleasure, as well as the position circle of the micrometer and the declination circle; a separate lamp illuminates the hour circle.
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  • In such large telescopes it becomes a matter of the first importance to provide means of convenient access to the eye-end of the instrument.
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  • This framework is provided with guides on which the platform, whilst preserving its horizontality, is V the observer has to follow the eye-end in a comparatively small circle; another good point is the flattening of the cast-iron centrepiece of the tube so that the flange of the declination axis is attached as near to the axis of the telescope tube as is consistent with free passage of the cone of rays from the object-glass.
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  • The observer at the eye-end can also read off the hour and declination circles and communicate quick or slow motions, to the telescope both in right ascension and declination by conveniently Pulkovo, placed handles.
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  • The eye-end is shown on the plate, fig.
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  • He is provided with quick and slow motions in right ascension and declination, which can be operated from the eye-end, and he can work in a closed and comfortably heated room.
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  • In the Konigsberg transit instrument used by Struve and Cohn, the clockwork was attached to the eye-end of the instrument - a condition which is obviously undesirable both from the necessarily unsymmetrical position of the clockwork with respect to the optical axis, and from the impossibility of securing the uniform going of the clock in different positions of the instrument.
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