. An introduction to vegetable physiology. Plant physiology. 148 VEGETABLE PHYSIOLOGY chlorophyll aJjsorbri tliost; particular ray« of light which are misamg. Ill lig. 8-i is a representation of the spectrum which such treatnK.'iit produces and which is called, from the facts just narrated, the uhsorption spectrum of chlorcjphyll. The uppermost ligure is that which is exhiljited hy an alcoholic solution or extract of leaves ; the middle one is gi\'en iiy chlorophyll dissolved in Ijenzol. The first hand on the left is the darkest, and is found to lie in the red part of the spec- trum. The three
. An introduction to vegetable physiology. Plant physiology. 148 VEGETABLE PHYSIOLOGY chlorophyll aJjsorbri tliost; particular ray« of light which are misamg. Ill lig. 8-i is a representation of the spectrum which such treatnK.'iit produces and which is called, from the facts just narrated, the uhsorption spectrum of chlorcjphyll. The uppermost ligure is that which is exhiljited hy an alcoholic solution or extract of leaves ; the middle one is gi\'en iiy chlorophyll dissolved in Ijenzol. The first hand on the left is the darkest, and is found to lie in the red part of the spec- trum. The three bands on the right are broader, but are. I a m IV V M 12" ¥\^^. 84.—Aiiyi)iuTii:)N Sri::rTi;A of OuLuiiui'jiiLL A^u Xantiioi'UVll. (Aftur Kraus.) not SO Well delined. They cover nearly all the Idue end. The tlnx'e thinner and lighter Ijands are in the yellow and green of the spectrum. Ohloropliyll therefore has the power of absorljing a large ruuuljer of red rays, a good many lilue \'iolet ones, and a. fe\v of th(_" green and yellow. The distinctness with which these absorption Ijands are seen de[)euds upon the strength of the solution, those in the red and blue jjcing, however, always prominent. Cari-lul experiments have proved that chlorophyll is a shigle pigment and not a mixture of two, as has often been stated. It is, however, easily decomposed, and the products of its decom-. 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 Green, J. Reynolds (Joseph Reynolds), 1848-1914. London, J. & A. Churchill
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