Excerpt from A Manual of Practical Physics For, Vol. 1: Students of Science and Engineering The aim of the present work is to furnish the student of pure or applied science with a self-contained manual of the theory and manipulation of those measurements in physics which bear most directly upon his subsequent work in other departments Of study and upon his future professional career. Only those experimental methods have been included that are strictly scientific and that can be depended upon to give good results in the hands of the average student. Although several pieces of apparatus, experimental methods, and deriva tions of formulae that possess some. Novelty appear, our fixed purpose has been to use the standard forms except in cases Where an extended trial in large classes has demonstrated the superiority of the proposed innovation. It has been assumed that the experiment is rare that should be performed before the student understands the theory in volved and the derivation Of the formula required. Couse quently the theory of each experiment is given in detail and the required formula developed at length. The more important sources of error are pointed out, and means are indicated by which these errors may be minimized or accounted for. 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.