2, looks as though composed of a number of segments, gradually decreasing in size from base to tip like the joints of a telescope, instead of tapering gradually and evenly from one extremity to the other.
This angle, therefore, divided by the magnifying power of the telescope gives the real angular distance of the centres of a double star.
' So far as we can ascertain, the first telescope of large size driven by clockwork was the 9-in.
The cutter employed to rule these lines removes the silver in fine lines from the surface of the glass, Thus, if a photographic plate, before it is exposed in the telescope, is placed with its sensitive surface nearly in contact with the silvered surface of this reseau, and if parallel light, normal to the surface of the plate, is allowed to fall on the silvered film through the glass on which the film has been deposited, that light will pass through the fine lines in the silver film where the silver has been removed by the cutter, but will otherwise be intercepted by the silver film.
Trans., 1802, p. 378), were independently discovered, and, by means of the telescope of a theodolite, between which and a distant slit admitting the light a prism was interposed, were for the first time carefully observed by Fraunhofer, and have on that account been designated "Fraunhofer's lines."
He certainly describes a method of constructing a telescope, but not so as to lead one to conclude that he was in possession of that instrument.
To telescope the jars for the next blow coming up. A skilful driller never allows his jars to strike on the downstroke, they are only used to jar down when the tools stick on some obstruction in the well before reaching the bottom, and in fishing operations.
The improvement of the telescope was justly regarded as a sine qua non for the advancement of astronomical knowledge.
The planets in question appeared in the telescope as star-like objects which could be compared with the stars with much greater accuracy than a planetary disk like that of Mars, the apparent form of which was changed by its varying phase, due to the different directions of the sun's illumination.
Here stands the Royal Observatory, in which the great Dunecht telescope was erected in 1896.
The eye, unaided or armed with a telescope, is able to see, as points of light, stars subtending no sentsible angle.
At a moment when the eye, or object-glass of a telescope, occupies a dark position, the star vanishes.
He fetched a small but powerful telescope, which had been in his satchel, and by its aid the little girl clearly saw the opening.
A telescope is like a very strong eye.
At a mute sign from him, a telescope was handed him which he rested on the back of a happy page who had run up to him, and he gazed at the opposite bank.
He had equipped himself with a mental telescope and looked into remote space, where petty worldliness hiding itself in misty distance had seemed to him great and infinite merely because it was not clearly seen.