The object of this little book is to supplement the ordinary text-books and class-work, and to afford the student some information as to the method of answering examination papers clearly and concisely. The recent extensive applications of Electricity in various industries have resulted in the adoption of a more systematic nomenclature than was previously in general use, and we have endeavoured, as far as practicable, to adhere to the more modern terms and expressions. There are, however, many such terms which are beyond the scope of the usual elementary course, and to adopt these, therefore, would tend rather to confuse the student than to assist him. The student should carefully study the Original Questions which are given on the closing pages of this book they will be found to cover practically the whole of the South Kensington Syllabus, and the student who can furnish satisfactory answers to those questions may be said to have a very fair knowledge of the rudiments of the Science of Electricity and Magnetism. In applying knowledge to the solution of questions, a great deal depends Upon the form in which the answer is stated, and every care should be exercised to ensure, not only that every point raised in the problem has been met, but also that no discursive or extraneous matter is introduced.