Fair. Hardcover Tanned textblock is unmarked. All textblock edges are dust-soiled. Inside frontand back hinges are spiltting but textblock is tight. Black boards are dingy and soiled. Spine and corners are bumped. A previous owner's name on first and first free end pages, which are badly soiled. Same name on last and last free end pages, which are browned at hinge. last end page has alson been used for notes. Name also on top textblock edge.
2nd Ed., 2nd Imp. Earlier copyright 1937. 9" x 6", 583 pages; various tables, appendices, both author & subject indices; "This book deals with the laws governing the operation of the vacuum tube itself instead of presenting a large number of circuits in which the tube may be used. " (p. ix, Preface to the First Edition), for the 2nd ed. material has been revised, rearranged and "divided into 2 parts: the first part covering basic concepts and underlying fundamentals, the second part devoted to the presentation and analysis of fundamental applications. " VG.
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