The Popular Science Monthly Volume 39

The Popular Science Monthly Volume 39

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: ...but still, sometimes a cloud will descend so quickly, or it will have such a tremendous store of energy to get rid of, that no points are sufficiently rapid for the work, and crash it all comes at once." Where a flash occurs, a considerable area is relieved of strain, and the rush of electricity along the cloud and along the ground toward the line of flash sets up a state of things very encouraging to another or secondary flash or flashes, practically simultaneous with the first. Weather Plants.--Garden and Forest quotes from a writer in the lllustrirte Oarlenzeitung of Vienna, who, while he disputes the excessive claims that have been made for certain "weather plants," points out that a modest degree of power in forecasting atmospheric changes is possessed by a multitude of common plants. The pleasant fair-weather odor of Galium vernum (Our Lady's bed-straw) becomes strong and pungent at the approach of rain. The leaves of Carlina vulgaris close before rain. Calendula pluvialit (marigold) predicts rain when its flowers remain closed after seven in the morning. Ozolis acelosella (wood-sorrel) closes its leaves at the approach of rain or cold. Lapsana communis keeps its flowers open at evening if it is to rain the following day, but closes them if fair weather is coming. The leaves of Draha verna (whitlowgrass) droop before rain. Alsine media predicts a clear day if its flowers open about nine o'clock, and a second one to follow if they remain open as late as four in the afternoon. A NoTfl Monnd-bnlldrrs' Strnctnrc, --Prof. F. W. Putnam described, at the meeting of the American Association, a curious earthwork at Foster's Station, in the Little Miami Valley. The mound is in the angle of a creek and the river. It is a...
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Product details

  • Paperback | 420 pages
  • 189 x 246 x 22mm | 744g
  • United States
  • English
  • black & white illustrations
  • 1236863712
  • 9781236863713