The Principles and Practice of Sampling Metallic Metallurgical Materials

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Excerpt from The Principles and Practice of Sampling Metallic Metallurgical Materials: With Special Reference to the Sampling of Copper Bullion The ultimate purpose of sampling may be said to be the establish ment of the commercial or chemical value of a bulk of any material. As such a bulk is, in nearly every case, large and unwieldly, sampling is designed to furnish a small and readily handled part, in which the quantitative relations of the various constituents are the same as in the bulk, so that the percentage of any of its constituents may be ascertained and the value so obtained will apply to the bulk.' The foregoing statements may be put into algebraic expression as fol lows: Let W represent the weight of the bulk, N the weight of any given constituent in the bulk of which the percentage X is to be found, and let w represent the weight of the sample and n the weight of the constituent in the sample corresponding to N in the bulk. For correct sampling the following relations must be true. 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.