. Botany of the living plant. Botany. NUTRITION, STORAGE, AND RESPIRATION H3 separation resident in its carbonaceous materials into kinetic energy. This may be exhibited in tlic movements, or other physiological changes which accompany life ; while the final products may be, like those of combustion, carbon dioxide and water. For the combustion of coal a supply of free oxygen is necessary. The same is the case for the life of ordinary organisms, animal or vegetable. During life they also carry' on a gaseous interchange. Free oxygen is absorbed from the air, and carbon dioxide is evolved. To th
. Botany of the living plant. Botany. NUTRITION, STORAGE, AND RESPIRATION H3 separation resident in its carbonaceous materials into kinetic energy. This may be exhibited in tlic movements, or other physiological changes which accompany life ; while the final products may be, like those of combustion, carbon dioxide and water. For the combustion of coal a supply of free oxygen is necessary. The same is the case for the life of ordinary organisms, animal or vegetable. During life they also carry' on a gaseous interchange. Free oxygen is absorbed from the air, and carbon dioxide is evolved. To this interchange the term Respiration is applied. The evolution of carbon dioxide by living plants is most readily demonstrated inthe case of germinating seeds or of flowers, in which. Fig. 82. .Arrangement for demonstratina; Respiration, a, sho\re .an earlier stage in the experiment: b, a later stage. See Text. respiration is specially active. It a stoppered jar be filled about one third with germinating peas or wheat, the rest of the space being filled with atmospheric air, and left for say t^velve hours, and the gas be then tested with a burning splinter of wood, the flame will be extin- guished, showing that sufficient oxygen is not present to support combustion of the wood. The oxygen in the jar has been absorbed, and it has been replaced by carbon dioxide. But a more satisfactory demonstration of what has happened is given by the apparatus shown in Fig. 82. A globe connected with a long tubular neck is used. Into it a quantity of flower-buds are passed, the rest of the space being filled with atmospheric air. It is then fixed with the tube projecting downw^ards into a mercury bath. The buds are thus in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bower, F. O. (Frederick Orpen), 1855-1948. London, Mac
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
