Book reviews

Transmission Line Formulas. Second edition, revised and enlarged; illustrated; D. Van Nostrand. 215 pp., 6 by 9 in.; cloth; price, $3.00 net. A book of unquestionable worth to the profession is Doctor Herbert Bristol Dwight´s work entitled Transmission on Line Formulas. This is already in its second edition; a book giving the engineer a set of instructions by which he may be enabled to make good electrical calculations for transmission lines with the least possible amount of labor. Charts, tables of formulas and tables of line constants have been so arranged as to make their application convenient and efficient. Also a number of chapters have been included wherein the derivation of the principal working formulas is given.