Monthly Notices of the Royal Astronomical Society, Volume 68; Volumes 1907-1908Priestley and Weale, 1908 Includes lists of additions to the society's library, usually separately paged. |
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Page 6
... lens has an aperture of 4 inches [ 101 mm . ] , and is of focal length 14 feet [ 4267 mm . ] . A Rowland plane grating , with ruled surface 5 × 3 inches 6 Mr. H. F. Newall , Observations of Cyanogen in LXVIII . I ,
... lens has an aperture of 4 inches [ 101 mm . ] , and is of focal length 14 feet [ 4267 mm . ] . A Rowland plane grating , with ruled surface 5 × 3 inches 6 Mr. H. F. Newall , Observations of Cyanogen in LXVIII . I ,
Page 7
... LENS GRATING AXIS OF ROTATION on which the grating turns , any part of the spectrum can be ... focal plane at a point midway between the middle point of the slit and its ... length Nov. 1907. Solar Atmosphere and in Interplanetary Space . 7.
... LENS GRATING AXIS OF ROTATION on which the grating turns , any part of the spectrum can be ... focal plane at a point midway between the middle point of the slit and its ... length Nov. 1907. Solar Atmosphere and in Interplanetary Space . 7.
Page 16
... lens has a focal length of about 600 mm . The instrument was attached to the 6 - in . Cooke equatorial in the south dome of this observatory , the plane of dispersion being made parallel to a circle of declination . For guiding , a ...
... lens has a focal length of about 600 mm . The instrument was attached to the 6 - in . Cooke equatorial in the south dome of this observatory , the plane of dispersion being made parallel to a circle of declination . For guiding , a ...
Page 39
... focal length 28 feet . The power generally employed was 670. When bright stars were observed a blue glass shade was usually employed to diminish the light and irradiation . The observations were made in variously coloured fields or in a ...
... focal length 28 feet . The power generally employed was 670. When bright stars were observed a blue glass shade was usually employed to diminish the light and irradiation . The observations were made in variously coloured fields or in a ...
Page 65
... focal length , and the apparatus , although powerful , was not expensive . Subsequently a tower and dome were added , and a 12 - inch telescope was erected for photographic work upon the Sun. After the preliminary ex- periments had been ...
... focal length , and the apparatus , although powerful , was not expensive . Subsequently a tower and dome were added , and a 12 - inch telescope was erected for photographic work upon the Sun. After the preliminary ex- periments had been ...
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Common terms and phrases
angle appear Astrographic axis bright brighter Cape Catalogue centre coefficient colour column comet comparison stars computed corrections correlation curve cyanogen David Gill deduced determination distance Double Stars drift E. E. Barnard Earth eclipse epoch equation equatorial faint formula give given Greenwich groups heliometer instrument Julian Day Jupiter latitude lens Lick Observatory limb lines longitude magnitude Max Wolf mean measures meridian method Monthly Notices Moon nebula nucleus number of stars observations obtained orbit outer condensation paper parallax Paris perihelion perihelion passage period perturbations photographs planet plates position present Professor proper motion reduced reflector refraction refractor region right ascension ring Royal Observatory satellite Saturn seen Sept solar spectra spectral class spectroheliograph spectroscope spectrum spot stellar sun-spot Sun's surface Table telescope tion variable Yerkes Observatory zone ΙΟ