Congressional Edition Volume 2514

Congressional Edition Volume 2514

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 edition. Excerpt: ...the winter months in Oregon and Washington Territory, known throughout the northwest as the Chinook wind; probably so called because it was found in that section alone where the universal jargon used by the Hudson Bay Company's traders in their communication with the various tribes of Indians was known as the Chinook language. These winds, occurring at irregular intervals, usually not oftener than three days in any month, having a favorable influence upon the climate, moderating the cold winter months, and melting the snow, so that it is not unusual for several inches of snow to disappear in several hours of one day. The average conditions existing during the prevalence of a Chinook wind are an air temperature of about 46 F., the wet-bulb thermometer reading about 40 F., the dew-point about 31 F., and the relative amount of humidity in the air about 56 per cent.; a southwest wind of considerable force, averaging in exposed localities 20 miles per hour, a barometric pressure, usually but not invariably, slightly above the normal, frequently preceding by about three days an abnormally high barometric pressure. These winds rarely last more than twenty-four hours and are entirely distinct in all their characteristics from the ordinary southwest winds which prevail in these sections. They seem to advance eastward by impulsion, and, under favorable atmospheric conditions reach into the mountainous regions of Idaho and Montana, and occasionally into western Dakota, but under unfavorable conditions, their advance is stopped, and they lose, as they reach eastward, their peculiar dryness and warmth, and in the vernacular of the country it is said, "The Chinook freezes up." Tables showing dates in the month of June of Imo percentage of more

Product details

  • Paperback | 578 pages
  • 189 x 246 x 30mm | 1,021g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236515560
  • 9781236515568