The book Johnston's Elements of Agricultural Chemistry; was written by author Johnston, Jas. F. W. (James Finlay Weir), 1796-1855 Here you can read free online of Johnston's Elements of Agricultural Chemistry; book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Johnston's Elements of Agricultural Chemistry; a good or bad book?
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As this process goes on to a much greater extent than the other, the latter process is not apparent during the daytime. The oxygen evolved in six hours' time under the action of moderately strong sunlight has been calculated to be as much as would be absorbed by the process of respiration in twenty-four hours. The changes which carbon dioxide undergoes whilst in the wonderful vegetable laboratory are not thoroughly understood. We know that a large portion of its oxygen is separated from it, and... evolved in a pure state into the atmosphere. The influence of light in enabling plants to absorb and decompose carbon dioxide has been conclusively proved by numerous Amount of CO.^ beneficial to Plants. 25 1 experimenters, but by none more strikingly than by Boussingault. He found that a bean seed weighing 0.922 gramme (a gramme is nearly 15^ grains) became in twenty-five days a plant which weighed (when dried) 1.293 grammes, being an increase in its weight of 0.371 gramme. This increase consisted of 0.1926 gramme of carbon, 0.02 gramme of hydrogen, and 0.1591 gramme of oxygen.
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