Smithsonian Miscellaneous Collections, Volume 69,Numéro 1Smithsonian Institution., 1913 |
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Expressions et termes fréquents
angle Approximate Absolute approximate difference argument is given astronomical twilight Attached Ther avoirdupois BAROMETER IN INCHES barometer reading BAROMETER TO STANDARD barometric formula barometric pressure Centigrade CENTIGRADE SCALE computed conversion corresponding cos² degree density DETERMINATION OF HEIGHTS dew-point difference of height different latitudes dynes ENGLISH MEASURES equation Example Grains grams gravity with altitude heit hundredths isobar kilogram lower station mean solar meters per sec meters per second METRIC MEASURES miles per hour millibars MILLIMETERS INTO INCHES minutes and seconds numerator OII OII OII pound Pressure of aqueous PSYCHROMETRIC PSYCHROMETRIC OBSERVATIONS REDUCTION OF PSYCHROMETRIC relative humidity SCALE TO CENTIGRADE SCALE TO FAHRENHEIT sea level side argument sidereal sin² SMITHSONIAN TABLES standard gravity STANDARD TEMPERATURE SUBTRACTED table gives tabular values tenth thermometer top argument ture values are given vapor pressure velocity water-vapor wwww Ι.ΟΙ ΙΟ ΙΟΙ ΟΙΟ ΟΙΟ ΟΙΟ
Fréquemment cités
Page 222 - Bather large globular masses, white or grayish, partially shaded, arranged in groups or lines, and often so closely packed that their edges appear confused.
Page 222 - Cirro-nebula) at other times presenting, more or less distinctly, a formation like a tangled web.
Page 223 - Woolpack Clouds — Thick clouds of which the upper surface is dome-shaped and exhibits protuberances, while the base is horizontal. These clouds appear to be formed by a diurnal ascensional movement which is almost always observable. When the cloud is opposite the sun, the surfaces usually presented to the observer have a greater brilliance than the margins of the protuberances.
Page 223 - Heavy masses of cloud rising in the form of mountains, turrets, or anvils, generally surmounted by a sheet or screen of fibrous appearance (false cirrus) and having at its base a mass of cloud • V.
Page 223 - ... 10. Stratus (St.). — A uniform layer of cloud resembling a fog but not resting on the ground. When this sheet is broken up into irregular shreds in a wind, or by the summits of mountains, it may be distinguished by the name Fracto-strattis (Fr.-St.).
Page 222 - St.-Cu. presents the appearance of a gray layer irregularly broken up into masses of which the edge is often formed of smaller masses, often of wavy appearance resembling A.-Cu. Sometimes this cloud-form presents the characteristic appearance of great rolls arranged in parallel lines and pressed close up against one another. In their centers these rolls are of a dark color. Blue sky may be seen through the intervening spaces which are of a much lighter color.
Page 223 - Sometimes the upper edges assume the compact form of cumulus, and form massive peaks round which delicate "false cirrus" floats. At other times the edges themselves separate into a fringe of filaments similar to cirrus clouds. This last form is particularly common in spring showers. The front of thunderclouds of wide extent frequently presents the form of a large arc spread over a portion of a uniformly brighter sky.
Page 222 - Rain clouds; a thick layer of dark clouds, without shape and with ragged edges, from which continued rain or snow generally falls.
Page 223 - True cumulus has well-defined upper and lower limits, but in strong winds a broken cloud resembling cumulus is often seen in which the detached portions undergo continual change. This form may be distinguished by the name Fracto-cumulus (Fr.-Cu).
Page vi - ... proof-sheets of the entire work. I desire to express my acknowledgments to Prof. CLEVELAND ABBE, for the manuscript of Tables 32, 81, 82, 83, 84, 85, 86; to Mr. HA HAZEN, for Tables 49, 50, 94, 95, 96, which have been taken from his Hand-book of Meteorological Tables; and also to the Superintendent of the United States Coast and Geodetic Survey, the Chief Signal Officer of the Army, and the Chief of the Weather Bureau, for much valuable counsel during the progress of the work. SP LANGLEY, Secretary....