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" The best ascertained facts are the importance of sunlight for green coloring, the decomposition of carbonic-acid gas by the foliage, and certain phenomena relating to the direction or position of stems and leaves. There remains much yet to learn upon... "
The Florist and Pomologist: A Pictorial Monthly Magazine of Flowers, Fruits ... - Page 130
1866
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Journal of Botany, British and Foreign

Botany - 1866
...uncertain results. The best ascertained facts are, the importance of sunlight for green colouring, the decomposition of carbonic acid gas by the foliage,...several days or weeks, such as occurs in the Polar regions, produce in exhalation of oxygen, and in the fixing of green matter, as much effect as the...
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The American Journal of Science and Arts

Geology - 1866
...and uncertain results. The best ascertained facts are, the importance of sunlight for green coloring, the decomposition of carbonic acid gas by the foliage,...relative importance of light and heat. Does a prolonged li<<ht of several days or weeks, such as occurs in the polar regions, produce in exhalation of oxygen,...
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A First Report on the Relations Between Climates and Crops

Cleveland Abbe - Crops and climate - 1905 - 386 pages
...ascertained facts are the importance of sunlight for green coloring, the decomposition of carbonic-acid gas by the foliage, and certain phenomena relating...several days or weeks, such as occurs in the polar regions, produce in exhalation of oxygen, and in the fixing of green matter, as much effect as the...
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Bulletin, Issue 36

United States. Weather Bureau - Meteorology - 1905
...ascertained facts are the importance of sunlight for green coloring, the decomposition of carbonic-acid gas by the foliage, and certain phenomena relating...several days or weeks, such as occurs in the polar regions, produce in exhalation of oxygen, and in the fixing of green matter, as much effect as the...
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A First Report on the Relations Between Climates and Crops

Cleveland Abbe - Crops and climate - 1905 - 386 pages
...ascertained facts are the importance of sunlight for green coloring, the decomposition of carbonic-acid gas by the foliage, and certain phenomena relating...combination of time and light, and the relative importance or light and heat. Does a prolonged light of several days or weeks, such as occurs in the polar regions,...
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