Monthly Notices of the Royal Astronomical SocietyPriestly and Weale, 1858 |
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Page 37
... mirrors for combining the pictures . The photographs were capable of being resolved ; and the illu- mination was effected by Tyler and Son's new Belmontine lamps , large mirrors being provided for daylight . The appearance of rotundity ...
... mirrors for combining the pictures . The photographs were capable of being resolved ; and the illu- mination was effected by Tyler and Son's new Belmontine lamps , large mirrors being provided for daylight . The appearance of rotundity ...
Page 49
... mirrors of the 20 - foot telescope are as perfect both in point of curve and regularity as those of the 9 - foot telescope , and only require an atmosphere proportionately fine to establish their proportionate efficiency . No impression ...
... mirrors of the 20 - foot telescope are as perfect both in point of curve and regularity as those of the 9 - foot telescope , and only require an atmosphere proportionately fine to establish their proportionate efficiency . No impression ...
Page 55
... mirror . Quite recently I have taken the matter up again , which in the meanwhile M. Léon Foucault , see the Comptes ... mirror 91.00 8.9 Quicksilver mirror with glass .. .. 76.50 23.5 Metal mirror , Lord Rosse's alloy Object ...
... mirror . Quite recently I have taken the matter up again , which in the meanwhile M. Léon Foucault , see the Comptes ... mirror 91.00 8.9 Quicksilver mirror with glass .. .. 76.50 23.5 Metal mirror , Lord Rosse's alloy Object ...
Page 58
... mirror by this means ; it showed the interference - rings precisely as a good object - glass does . Upon this the mirror was again submitted to another polishing , and that without any further precaution . No alteration of any kind in ...
... mirror by this means ; it showed the interference - rings precisely as a good object - glass does . Upon this the mirror was again submitted to another polishing , and that without any further precaution . No alteration of any kind in ...
Page 169
... mirror ; this gradually brightens and becomes more and more metallic , and finally , in about three quarters of an hour , a film is obtained at ordinary temperatures which is extremely thin and regular in thickness ; this mirror has a ...
... mirror ; this gradually brightens and becomes more and more metallic , and finally , in about three quarters of an hour , a film is obtained at ordinary temperatures which is extremely thin and regular in thickness ; this mirror has a ...
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Common terms and phrases
Adams Admiral Smyth angle Apparent R.A. Apparent appearance April Arcturus Astronomer Royal axis bright calculated Captain Carrington Catalogue centre coefficient comparison computed correction crater dark determined diameter direction disk distance ditto Donati's Comet eclipse edge elements envelope ephemeris epoch equations equatoreal error exhibited Geminus Greenwich instrument Jupiter l'équation l'on latitude length light longitude luminous lunar Lune magnitude Mean Solar measures Memoirs meridian Minor Planets mirror Monthly Notices moon moon's limb Nautical Almanac nearly Norman Pogson nucleus object-glass observations obtained occultation October orbit paper perihelion phenomena polar position present Prof Professor proper motions R.A. Apparent N.P.D. rays réfractions remarkable right ascensions ring Royal Observatory Saturn séculaire seen Sept Sheepshanks side Society solar spots standard stars sun's surface T. W. Webb tail telescope theory tion Variable Star visible volume