. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. CHEMICAL AND PHYSIOLOGICAL STUDIES. 183 small strip, with an opaque sheath of tinfoil. Upon the uncovered strip a small spectrum of sunlight is thrown by means of a suitably arranged prism, and the whole left for some hours. The leaf is then cut off and immersed in alcohol, to dissolve out the chloro- phyll, and subsequently washed in distilled water and transfeiTed for a time to a vessel containing a solution of iodine in potas- sium iodide. It will then be
. The plant cell, its modifications and vital processes; a manual for students. Plant physiology; Plant anatomy; Plant cells and tissues. CHEMICAL AND PHYSIOLOGICAL STUDIES. 183 small strip, with an opaque sheath of tinfoil. Upon the uncovered strip a small spectrum of sunlight is thrown by means of a suitably arranged prism, and the whole left for some hours. The leaf is then cut off and immersed in alcohol, to dissolve out the chloro- phyll, and subsequently washed in distilled water and transfeiTed for a time to a vessel containing a solution of iodine in potas- sium iodide. It will then be found upon examining the leaf after again washing, that in the part which was illuminated by the spectrum a band of "stained" starch is present, the staining B, y V 0B^ /'*'' 11> ^ i\/yXn.\iJCL 'ivJiAVI 33^ Aii^ V J S. Fig. 115. —(a) Enoelmann's Bactebia Experiment.—S, Glass slide (opacxue); K, Y, V, three spaces left clear, which are illuminated by red, yellow, and violet rays respectively ; /, filament of Spirogyra. (6) Timiriazbff's Experiment.— L, Beam of white light; P, prism ; R, V, spectrum thrown upon a leaf. being deepest in that part which was previously illuminated by the red rays, and weakest at the opposite or violet end. Photosynthesis (followed by storing of starch) is thus more intense under the influence of rays of low refrangibility. These two experiments show conclusively that assimilation of. 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 Haig, Harold Axel. London, C. Griffin and Company, Ltd.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantanatomy, bookyea
