Excerpt from Practical Electricity and Magnetism Able courses of instruction in experimental work have already appeared, and have done a vast amount of good; but as these usually require expensive apparatus made and arranged for each experiment, they have not become so generally useful as otherwise might have been the case, especially in! Such instances where the scope of the work undertaken, precludes all possibility of separate and special apparatus being provided for each independent experiment; In technical work this is more particularly the case, seeing that in actual practice a set of instruments must be put to very divergent uses, in order that results may be obtained quickly and with sufficient accuracy for commercial work. This use of apparatus for ends not specially intended, is in itself a training of considerable importance, to any student who will afterwards, in his daily life, have to so adapt for different purposes, such instruments as may be available at the time. 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.