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Excerpt from Colorimetric Analysis It is hoped that this book will furnish a source to which students may refer for a knowledge of the colori metric methods practical for use and a source to which practical workers may refer for information as to the methods of performing the particular tests with which they are occupied. In all cases, weights of substances to be dissolved as standard have been given to four places, altho that by no means implies that absolute accuracy is necessary in the last two places, since the dilution will minimize any error made there. The giving of these accurate weights will, however, show the operator the direction in which the weight should tend in these last two places and thus can assist to greater accuracy without increasing the labor of weighing to any great extent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.