The book Students Laboratory Manual of Physical Geography was written by author Brigham, Albert Perry, 1855-1932 Here you can read free online of Students Laboratory Manual of Physical Geography book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Students Laboratory Manual of Physical Geography a good or bad book?
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Does the ivhite frost or the low temperature harm vege- tation ? Why is frost not to be expected in a cloudy night in spring or autumn? Why would a smudge be effective beyond the reach of the heat-rays from the fire ? In what way, precisely, does the covering of flowers or vegetables protect them from late or early frosts? Answer if you can such questions as these: Why are frosts less likely to occur just after a rain? Why are frosts common on low ground, while slopes or hilltops may escape? Wh...y is there less danger of frosts when the night is cloudy? If you have not thought of these ques- tions, it would be well to notice and record the exact con- ditions of the soil, of the wind, of the sky, and of the THE ATMOSPHERE 101 topography in case of the spring and autumn frosts. If you can not think out satisfactory answers to the ques- tions given above, seek them from reading and in the dis- cussions of the class-room. The Weather Bureau makes much of frost warnings, which have had great value in leading to the protection of fruit and other crops, as in California, where frosts are said to be the severest enemy of crops, excepting the insect pests.
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