THOMAS BOX, Author of 'PRACTICAL TREATISE ON HEAT,' 'MILL-GEARING,' ETC. THIRD EDITION. LONDON: E. & F. N. SPON, 48, CHARING CROSS. 1873. HARVARD COLLEGE LIBRARY TRANSFERRED FROM THE ENGINEERING SCHOOL LONDON: PRINTED BY W. CLOWES AND SONS, STAMFORD STREET PREFACE TO THE SECOND EDITION. In preparing a Second Edition of 'Practical Hydraulics' considerable alterations and additions have been made. To facilitate reference, the work has been divided into Chapters; additional Rules for Culverts and other subjects have been given, including several new Tables, and an increased number of Illustrations. These alterations were so considerable, that it was found necessary to re-write the whole, and thus opportunity was given to introduce much new and valuable information, which, it is hoped, will increase the usefulness of the work. BATH, July, 1870. PREFACE TO THE FIRST EDITION THE reader must not expect, in this little book, an exhaustive treatise on Hydraulics; many such have been written, and they leave little or nothing to be desired. This work consists of a series of Rules and Tables, giving unusual facility for the solution of questions which occur in the daily practice of Engineers. For the two leading questions-the Discharge of Pipes, and of Open Channels-two sets of Tables are given, the reason for |