Monthly Notices of the Royal Astronomical SocietyPriestly and Weale, 1861 |
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Page 1
... employed had an aperture of 72mm.5 ( 2.9 inches nearly ) , a focal length of 800mm ( 32 inches nearly ) , and was used with a magnifying power 47. The micrometer consisted of a glass plate in the field of view , bearing a net of equal ...
... employed had an aperture of 72mm.5 ( 2.9 inches nearly ) , a focal length of 800mm ( 32 inches nearly ) , and was used with a magnifying power 47. The micrometer consisted of a glass plate in the field of view , bearing a net of equal ...
Page 7
... employed 240 . The Lunar Crater Plato . Mr. Birt communicated a series of observations of this well- known crater , embracing a period of eighteen months , viz . , from January 1860 to July 1861 , which he had arranged according to the ...
... employed 240 . The Lunar Crater Plato . Mr. Birt communicated a series of observations of this well- known crater , embracing a period of eighteen months , viz . , from January 1860 to July 1861 , which he had arranged according to the ...
Page 34
... employed throughout the working , the factor f being restored in the final results . where it is to be noticed that the terms t cos arg . and t sin arg . arise from the substitution of e ' + f ' t for e ' in the coefficients of the ...
... employed throughout the working , the factor f being restored in the final results . where it is to be noticed that the terms t cos arg . and t sin arg . arise from the substitution of e ' + f ' t for e ' in the coefficients of the ...
Page 43
... employed was an excellent equatoreally- mounted achromatic , of 34 inches aperture and 42 inches focal length , belonging to Mr. Williamson , and the image of the Sun. was thrown on a screen . This image was very well defined , and ...
... employed was an excellent equatoreally- mounted achromatic , of 34 inches aperture and 42 inches focal length , belonging to Mr. Williamson , and the image of the Sun. was thrown on a screen . This image was very well defined , and ...
Page 46
... employ an excellent positive eyepiece , constructed for me by Mr. Dollond ; it has a large field , and gives a magnifying power of 60 , as determined by measuring the emergent pencil . Higher magnifiers are occa- sionally employed . The ...
... employ an excellent positive eyepiece , constructed for me by Mr. Dollond ; it has a large field , and gives a magnifying power of 60 , as determined by measuring the emergent pencil . Higher magnifiers are occa- sionally employed . The ...
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Common terms and phrases
2r+g Airy Alhazen Annex appears April Astronomer Royal bright Calculation CAYLEY clock Comet computed corrected crater Decl declination diameter difference distance Ditto ditto edge Ephemeris equations Equatoreal error excentricity eye-piece Greenwich inches aperture instrument July June Jupiter Jupiter's Satellites latitude light limb longitude Lunar m² e m² n² Mars Mean Solar measures Memoir meridian Minor Planets Monthly Notices Moon Moon's Mean Motion N.P.D. from Observation Nautical Almanac nearly Nebula nucleus Number of Observations obtained Occultation orbit parallax perihelion photographs Prof R.A. from Observation Radcliffe Catalogue radiation Right Ascension ring Royal Observatory Saturn Secular Acceleration shadow Sirius Small Planets Society Solar Eclipse soleil stars Struve Sun's disk surface T. W. Webb taches telescope term thermometer tion Transit of Mercury Ursa Variable Variable Stars W. R. Dawes Weisse