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Annals of the Dudley Observatory Volume 1

Dudley Observatory

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Description:This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 ...a minute of arc. The precision with which this machine will map stars is all that could be desired; since if two charts of the same zone, made on different nights, be placed one over the other, the stars will be superimposed so that the eye can detect no difference. By means of movable adjustments we can set the machine (having our sheet ruled for Eight Ascension and Declination), so that it will give the position of the zone, at the beginning of the year, without sensible error. For adjusting in Eight Ascension, the cylinder can be moved about its axis, being held in position by a friction block. For the declination, we lengthen or shorten the rod (/), by means of the screw (z), fig. 2. The scale for declination can be varied at pleasure, by changing the position of the connecting rod (/), on the lever I, fig. 1. This apparatus can be adapted to any Telescope either transit or equatorial; neither does its use interfere with the ordinary work for exact positions. In the observation of Asteroids on the meridian, a great deal of time is wasted, especially when the error of the Ephe meris is considerable. And even when the error is only 2' or 3' in declination, in certain portions of the heavens, it is almost impossible to find the body with a meridian instrument. This apparatus affords great facility in finding these bodies, when we have an approximate Ephemeris; since it is only necessary to observe, on two nights, a short zone of five minutes in Right Ascension and 10 minutes in Declination. The comparison of these two charts will at once show which is the planet, provided it is included within those limits; when, the Ephemeris being corrected, it can be observed on the meridian in the usual way. This has been thoroughly tested in finding the old Asteroids,...We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Annals of the Dudley Observatory Volume 1. To get started finding Annals of the Dudley Observatory Volume 1, you are right to find our website which has a comprehensive collection of manuals listed.
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ISBN: 1130580245

Description: This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 ...a minute of arc. The precision with which this machine will map stars is all that could be desired; since if two charts of the same zone, made on different nights, be placed one over the other, the stars will be superimposed so that the eye can detect no difference. By means of movable adjustments we can set the machine (having our sheet ruled for Eight Ascension and Declination), so that it will give the position of the zone, at the beginning of the year, without sensible error. For adjusting in Eight Ascension, the cylinder can be moved about its axis, being held in position by a friction block. For the declination, we lengthen or shorten the rod (/), by means of the screw (z), fig. 2. The scale for declination can be varied at pleasure, by changing the position of the connecting rod (/), on the lever I, fig. 1. This apparatus can be adapted to any Telescope either transit or equatorial; neither does its use interfere with the ordinary work for exact positions. In the observation of Asteroids on the meridian, a great deal of time is wasted, especially when the error of the Ephe meris is considerable. And even when the error is only 2' or 3' in declination, in certain portions of the heavens, it is almost impossible to find the body with a meridian instrument. This apparatus affords great facility in finding these bodies, when we have an approximate Ephemeris; since it is only necessary to observe, on two nights, a short zone of five minutes in Right Ascension and 10 minutes in Declination. The comparison of these two charts will at once show which is the planet, provided it is included within those limits; when, the Ephemeris being corrected, it can be observed on the meridian in the usual way. This has been thoroughly tested in finding the old Asteroids,...We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Annals of the Dudley Observatory Volume 1. To get started finding Annals of the Dudley Observatory Volume 1, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.

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Annals of the Dudley Observatory Volume 1

Annals of the Dudley Observatory Volume 1

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