Excerpt from Introduction to Chemical Preparations: A Guide in the Practical Teaching of Inorganic Chemistry In the choice of the preparations, care was taken to present to the student many fundamentally differ ent reactions. The author trusts to have done justice to the economy of the laboratory by starting, as far as possible, with cheap or valueless materials; for example, the residues of all sorts accumulated in every laboratory, or the by-products from other prepara tions. The finished preparations are, on the other hand, for the most part substances which are con tinually used in the laboratory in analytical and syn thetical processes, but which are either not generally found in the market or else not obtainable in a suf ficiently pure state. 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.