 | Royal Society of Edinburgh - Science - 1866 - 688 pages
...next the earth, keep the grass and delicate parts of other plants from sinking to the dew-point ; or, when there is not enough of clouds and wind to afford...hoar-frost appears, the dew-point itself is below the freeziug point. The following Donations to the Library were laid on the Table :— Catalogue of the... | |
 | William Thomson Baron Kelvin - Geology - 1894 - 642 pages
...either clouds, by their counter radiation, or wind, by mixing a comparatively thick stratum of air with that next the earth, keep the grass and delicate...hoar-frost appears, the dew-point itself is below the freezing-point. [Added December 15, 1892.]—Thus when neithcr clouds, nor wind blowing among the plants,... | |
 | Royal Society of Edinburgh - Science - 1866 - 690 pages
...either clouds, by their counter-radiation, or wind, by mixing a comparatively thick stratum of air with that next the earth, keep the grass and delicate...parts of other plants from sinking to the dew-point ; or, when there is not enough of clouds and wind to afford this degree of protection, dew begins to... | |
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When there is not enough of clouds and wind to afford this degree of protection, dew begins to form, and by preventing the temperature of any leaf or flower from sinking below the dew-point, saves them all from destruction, unless, as when hoar-frost... 