THE DYNAMO

Its Theory, Design, and ManufactureIN writing the present book it has been the endeavour of the authors to furnish to students a simple, yet accurate, account of the theory and design of the modern dynamo. That the attain ment of this aim is no light task we are only too well aware. Such a book, if it is to be of use to those who are either engaged or about to engage in electrical engineering as a pro fession, must combine both the theoretical and practical sides if it is not to repel the general scientific reader, it must be free from excessive technicality, while, lastly, it should not be too mathematical, since it is intended for the learner, who with a general knowledge of electricity comes to the special study of dynamos. Most of all, however, is it important that, so far as it goes, its statements should be entirely accurate. If, therefore, we have attained something of the all-saving merit of accuracy, many defects on other scores may be forgiven, and our attempt to write a new book on so well-worn a theme cannot be pronounced to have been entirely vain. A completely novel treatment of the subject must be either erroneous or well-nigh impossible to devise