Astronomical, Magnetic and Meteorological Observations Made at the United States Naval ObservatoryU.S. Government Printing Office, 1851 |
מהדורות אחרות - הצג הכל
מונחים וביטויים נפוצים
1st and N. L. Andromeda Anonymous April Aquarii Aquila ASSUMED LATITUDE 38 Auriga Barometer Bessel's Zone Bootis Canis Majoris Cassiopeia Cephei Ceti Chron CIRCLE AND MICROMETER column Comet Comet-Star Corr Corrected Readings Cygni DATE defective illumination Draconis Error of Runs fath's fathoms Geminorum Gulf Stream Herculis Hydræ Inst July July 24 June Jupiter Leonis Lyræ March Mercury meridian MICROMETER Midn't Moon N. E. trade winds NADIR POINTS Neptune Star North OBJECTS OBSERVED Observatory OBSERVED SEMI-DIAMETERS ocean Ophiuchi Orionis Pegasi Persei Polaris R. A. DEC READINGS OF CIRCLE Reduc Revs RIGHT ASCENSION S. L. Mic Sagittarii Saturn Scorpii Semi-diam Sept sounded for temperatures squalls Star a Star Star c Neptune Star k Stratus Tauri THERMOMETERS trade winds TRANSIT OVER WIRES unsteady Ursa Minoris VALUE OF CLOCK Venus Vertical wires Virginis vizi Weisse Zenith Point Δα Δρ
קטעים בולטים
עמוד 56 - The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to his circuits. All the rivers run into the sea; yet the sea is not full; unto the place from whence the rivers come, thither they return again.
עמוד 62 - The maximum temperature of the Gulf Stream is 86°, or about 9° above the ocean temperature due the latitude. Increasing its latitude 10°, it loses but 2° of temperature ; and, after having run three thousand miles towards the north, it still preserves, even in winter, the heat of summer.
עמוד 60 - Major Rennell likens the stream to " an immense river descending from a higher level into a plain." Now we know very nearly the average breadth and velocity of the Gulf Stream in the Florida Pass. We also know, with a like degree of approximation, the velocity and breadth of the same waters off Cape Hatteras. Their breadth here is about seventy-five miles against thirty-two in the " Narrows" of the Straits, and their mean velocity is three knots off Hatteras against four in the
עמוד 91 - Now, is it not more than probable that here we have in the magnetism of the atmosphere that agent which guides the air from the south through the calms of Capricorn, of the equator, and of Cancer, and conducts it into the north...
עמוד 89 - De Haven was about to sail in command of the American Expedition in search of Sir John Franklin. Infusoria are sometimes found in sea-dust, rain-drops, hail-stones or snow-flakes ; and if by any chance it should so turn out that the locus of any of the microscopic infusoria which might be found descending with the precipitation of the Arctic regions should be identified as belonging to the regions of the...
עמוד 93 - ... a If the current is more feeble in every winding as it is nearer to the centre of the spiral, then that half is " attracted by a South pole in which the current enters except the first winding. " b But if the current is stronger in every winding as it is nearer to the centre of the spiral than that " half is repulsed by a South pole in which the current enters including the first winding.
עמוד 60 - This being the case, it is easy to show that the depth of the Gulf Stream off Hatteras is not so great as it is in the
עמוד 63 - He there found a current setting to the south, and bearing with it this extremely cold water, with vast numbers of icebergs, whose centres, perhaps, were far below zero. It would be curious to ascertain the routes of these under currents on their way to the tropical regions, which they are intended to cool.