These books cover the electrical principles syllabuses of all the major examining bodies, including the City & Guilds of London Institute's electrical craft courses. The book is well illustrated with over 200 line diagrams and photographs. Theories are explained with the help of worked examples and there are more than 300 (400 in volume 2) graded exercises for which numerical answers are provided as well as over 300 multiple choice questions with solutions.

Illustrations and photographs are given to elucidate comprehension of key concepts. Extra learning material has been added under Additional Learning to teach wider aspects of the basic concepts

Quarterly accession lists; beginning with Apr. 1893, the bulletin is limited to "subject lists, special bibliographies, and reprints or facsimiles of original documents, prints and manuscripts in the Library," the accessions being recorded in a separate classified list, Jan.-Apr. 1893, a weekly bulletin Apr. 1893-Apr. 1894, as well as a classified list of later accessions in the last number published of the bulletin itself (Jan. 1896)

Includes annual report of its council (1941-48, in pt. 1).