Lanterna Rally

Author: Hans C. Behr

Publisher: Forgotten Books

Published: 2018-02-08

Total Pages: 234

ISBN-13: 9780656124817

Excerpt from Mine Drainage, Pumps, Etc Dear sir: In pursuance of your instructions, I have prepared this Bulletin of the State Mining Bureau, treating of the most important applications of water-raising machinery for the drainage of mines. It has been my aim to make this a short, popular exposition of methods, constructions, and principles involved in the machines used in the extremely varied conditions of mining on the Pacific Coast and, in view of the modern improvements and facilities in the transmission of power, which may make advantageous the use of machines not now employed in mine drainage, these have also been given consideration. The amount of ground covered in the treatment of each subject has necessarily been limited. The principles governing the design and Oper ation of apparatus have, however, been given at some length, in order to render them clear. Only where absolutely necessary has use been made of mathematical expressions, and these most simple. The old Cornish and other non-rotative engines applied to the so called Cornish system, which are to-day practically obsolete, have received only the brief notice due from the standpoint of historical reference, and where necessary to explain motives for improvement of methods. As akin to the general subject, water-raising machines applied to other uses than mine drainage are incidentally mentioned; and in an appendix will be found some remarks on the appliances used in irrigation and land drainage. Among the difficulties encountered in preparing a work of this nature, and which cause delay in its completion, are those of obtaining correct data with reference to the practical working of apparatus, and recon oiling contradictory statements of results. 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.