Pigments of Flowering Plants, Vol. 6 (Classic Reprint)

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Excerpt from Pigments of Flowering Plants, Vol. 6Among substances referable to hydrocarbons of the degree of saturation cnhznfi, no substances colored in the ordinary sense are known to exist but several pigment producing substances are known. All substances, however, having a benzenoid group ing are colored in a physical sense, since they all exhibit selec tive absorption, not, it is true in the visible portion of the spectrum but just beyond it in the ultra violet.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.