Report on the Preparations For, and Observations of the Transit of Venus: As Seen at Roorkee and Lahore, on December 8, 1874Office of the Superintendent of Government Printing, 1877 - 54 Seiten |
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Report On The Preparations For, And Observations Of The Transit Of Venus: As ... James Francis Tennant Keine Leseprobe verfügbar - 2015 |
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Alt-Azimuth ALT-AZIMUTH OBSERVATIONS ANPD appears appt assumed ASTRONOMER ROYAL azimuth Beer and Mädler bright Calcutta Captain CAMPBELL Captain STRAHAN Captain STRAHAN'S observations chronograph Chronometer clock Collimator collodion Colonel complete value computed COOKE and SONS correction crater craterlet cusp measures December deduced determined dial diameter Diff distance of limbs Ditto ditto Donald Town equations of condition equatoreal feet floor formulæ Gaudibert give instrument internal contact Lahore light Linné longitude lunar atmosphere Madras Majáng Station Mare Imbrium Mare Serenitatis mean micrometer Monthly Notices mountain Mussoorie objects Observatory Parallax Photoheliograph pillar planet Plato Posidonius position probable error record reflector refraction ridge Right Ascension Roorkee RUE'S scale Schröter selenographer semi-diameter of Venus Sidereal signals Solar stars streak Sun and Venus Sun's telescope tint tion Transit axis Transit of Venus Trigonometrical Survey valley Webb zero ΔΠ
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Seite 75 - VARIATIONS IN THE APPEARANCE OF THE LUNAR PLAIN " PLATO." BY WK BT7BT, FKAS of the most promising lines of research having reference to the physical aspect of the moon's surface, consists in an examination from time to time of the tints which characterize every. portion of the visible disk.
Seite 74 - Calculations, made from occupations of stars, on the apparent differences of the semidiameter of the bright and dark moon give an amount of difference which might indicate a minute atmosphere, but which Mr. Airy attributes to irradiation. Supposing the moon to be constituted of similar materials to the earth, it must be, to say the least, doubtful whether there is oxygen enough to oxidate the metals of which she is composed; and if not, the surface which we see must be metallic, or nearly so.
Seite 74 - ... surface of some metals, such as bismuth, or, according to Professor Phillips, silver, when cooling from fusion and just previous to solidifying; and it might be a fair subject of enquiry whether, if there be any coating of oxide on the surface, it may not be so thin as not to disguise the form of the congealed metallic masses, as they may have set in cooling from igneous fusion.