A Textbook of Botany for Colleges, Parts 1-2

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MacMillan Company, 1921 - Botany - 401 pages
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Page 22 - The average person knows that atmospheric air contains about 21 per cent, of oxygen and 79 per cent, of nitrogen (with other inert gases), mixed with a trace of carbon dioxide and varying amounts of water-vapour.
Page 21 - ... adapted to spread chlorenchyma to light. The formation of the sugar being thus a process of synthesis under action of light, is known as PHOTOSYNTHESIS. What now are the materials from which the grape sugar is constructed? The chemical formula of grape sugar is...
Page v - A very good, up-to-date college text, "written in the knowledge that to nearly all college students an introductory course in Botany is part of a general education, and not a preparation for a professional botanical career ... In conformity with this aim, the book gives more attention to the large and visible aspects of plant nature than to the minute and obscure.

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