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  "text": "XII. Mercurius a Venere occultatus Maii 17.\n1737. in Observatorio Regio Grenovici,\nab J. Bevis, M.D. observatus.\n\nTem. Appar. P.M.\nH. M. S.\nI 37 03 Præcedens Limbus Veneris Meridianum transit, centro a Vertice\n25° 46' 35\".\nMercurium vero intra telescopium ne-\nquaquam conspiciebam.\n\n9 04 09 Centrum Mercurii Limbum Veneris præ-\ncedentem præcedebat 12\" Temporis.\n06 20 Repetit. eodem tempore præcedebat,\nquo prius.\n\n28 00 Mercurio Filum parallelum Micrometri\ndecurrente, Cuspis Veneris austrina\nab eodem Filo rescinditur, unde Venerem Mercurium obtecturam, vel saltem stricturam colligebam; Micrometrum itaque extrahebam, quo melius instantem Contactum discer-\nnerem Tubo 24 Pedum.\n\n43 04 Mercurius haud plus distat a Venere\nquam decima vel duodecima parte\nDiametri Veneris: Deinde inimicæ Nubes.\n\n51 10 Venus iterum clarissime effulget, Mer-\ncurius vero totus sub Venere latet.\nNubes jam Venerem rursus excipiunt,\nulteriorem tam rari spectaculi con-\ntemplationem prohibentes.\n\nMaii\nMaii 18. P. M.\nDistantia Meridiana Solis a Vertice\n30° 04'.\nLimbus praecedens Veneris Meridian.\ntransit. Centro distant a Vertice\n25° 57' 15''.\nMercurium culminantem neque hac die\nvidere licuit, coelo licet admodum\nsereno.\nN. B. Distantiæ a vertice a refractionibus non purgantur.\nVide Fig. 2. in Tab.\n\nXIII. The Use of a new Azimuth Compass for finding the Variation of the Compass or Magnetic Needle at Sea, with greater Ease and Exactness than by any ever yet contriv'd for that Purpose; by Captain Christopher Middleton, F. R. S.\n\nTo discover the Declination of the Magnetic Needle, or Variation of the Compass at Sea, with some tolerable Degree of Certainty and Exactness, is a thing of great Use and Importance in the Art of Navigation.\n\nThe Instruments and Methods hitherto used for this Purpose, (as we could easily demonstrate, if it were needful) are subject to several Inconveniencies, Errors and Defects; to remedy which, this new Azimuth Com-",
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    "identifier": "jstor-103943",
    "title": "Mercurius a Venere Occultatus Maii 17. 1737. in Observatorio Regio Grenovici, ab J. Bevis, M. D. Observatus.",
    "authors": "J. Bevis",
    "year": 1737,
    "volume": "40",
    "journal": "Philosophical Transactions (1683-1775)",
    "page_count": 4,
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