Practical Blowpipe Assaying Classic Reprint PDF Download

Excerpt from Blowpipe Practice: An Outline of Blowpipe Manipulation and Analysis, With Origin Tables, for the Determination of All Known Minerals The title-page to this little work indicates succinctly the scope and character of the book. The work comprises two distinct parts: an introductory sketch of the use of the Blowpipe in qualitative mineral examinations; and a series of Tables, with chemical and crystallographic notes, for the practical determination of minerals, generally. In the first portion of the work, the writer's aim has been to systematise and condense as far as possible: but, although confessedly a mere outline of the subject, this introductory portion will not be found altogether devoid of original matter. The sixth section, more especially, contains a new and greatly simplified plan of Blowpipe Analysis, by which the general composition of an unknown substance may be determined in most cases very rapidly and with comparatively little trouble. As a rule, the methods of Blowpipe Analysis, hitherto published, are little more than Tables of Reactions. They attempt no separation of electro-negative bodies from bases, but mix up the two, very illogically; and they exact the performance of many unnecessary experiments, by which certain components become detected over and over again, whilst others escape detection, altogether, or are recognized only after much unnecessary delay. These defects are remedied very materially, it is thought, in the method now proposed. The Determinative Tables, which occupy the second and principal portion of the work, are also original. In their arrangement, an attempt is made to place bodies of related composition, only, under the same subdivision: so as to avoid, wherever possible, the unnatural collocations so commonly seen in Tables of this character. It will be evident, however, that without greatly increasing the number of the Tables, complete success in this respect is not always attainable. 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.