Excerpt from Henley's Twentieth Century Book of Recipes, Formulas and Processes In compiling this book of formulas, recipes and processes, the Editor has endeavored to meet primarily the practical requirements of the mechanic, the manufacturer, the artisan, and the housewife. An idea) book for this purpose would naturally include only formulas and recipes which have been carefully tested. Such a course would have been impracticable, for the reason that chemical or technological tests of several thousand processes would have taxed the resources of a large laboratory, would have entailed a prohibitive expense, and would have required years of painstaking labor. The next best course is naturally the selection of recipes from trustworthy sources. It is this simpler course which the Editor has adopted. Inasmuch as the authorities whom he has consulted have themselves in many cases spared no pains in obtaining accuracy, the Editor has reason to believe that the recipes to be found in the following pages will be found sufficiently correct, in the main, for the needs of everyday life. In addition to exercising the utmost care in selecting his materials from competent sources, the Editor has also modified formulas which were obviously ill adapted for his needs, but were still valuable if altered. Processes of questionable merit he has discarded. By adhering to this plan the Editor trusts that he has succeeded in preparing a repository of useful knowledge representing the experience of practical men in every branch of technical achievement. Much of the matter has been specially translated for this work from foreign technological periodicals and books. In this way the Editor has succeeded, he hopes, in embodying much practical information otherwise inaccessible to most English-speaking people. Each recipe is to be regarded as a basis of experiment, to be modified to suit the particular purpose in band, or the peculiar conditions which may affect the experimenter. Chemicals are rarely of uniform relative purity and strength; heat or cold may markedly influence the result obtained, and lack of skill in the handling of utensils and instruments may often cause failure. 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.