Units of Measurement.--Measures.--Testing.--Conductors.-- Dielectrics.--Submarine Cables.--Telegraphy.--Electro-Chemistry.-- Electro-Metallurgy.--Batteries.--Dynamos and Motors.--Transformers. --Electric Lighting.--Miscellaneous.--Logarithms.--Appendices. “Wonderfully Perfect.... Worthy of the highest commendation we can give it.”--_Electrician._ “The Sterling Value of Messrs. Munro and Jamieson’s Pocket-book.” --_Electrical Review._ * * * * * LONDON: CHARLES GRIFFIN & CO., LIMITED, EXETER STREET, STRAND. * * * * * Just Out. In Large 8vo. Profusely Illustrated. 8s. 6d. net. WIRELESS TELEGRAPHY. By GUSTAVE EICHHORN, Ph.D. Contents.--Oscillations.--Closed Oscillation Systems.--Open Oscillation Systems.--Coupled Systems.--The Coupling Compensating the Aerial Wire.--The Receiver.--Comparative Measurement in the Sender.--Theoretical Results and Calculations in respect of Sender and Receiver.--Closely-Coupled Sender and Receiver.--Loose-Coupled Sender and Receiver.--Principal Formulæ.--The Ondameter.--Working a Wireless Telegraph Station.--Modern Apparatus and Methods of Working.--Conclusion.--Bibliography.--Index. * * * * * Just Out. Large 8vo, Handsome Cloth, with 334 Pages and 307 Illustrations. 16s. net. ELECTRICITY METERS. By HENRY G. SOLOMON, A.M.Inst.E.E. Contents.--Introductory.--General Principles of Continuous-Current Meters.--Continuous-Current Quantity Meters.--Continuous-Energy Motor Meters.--Different Types.--Special Purposes, i.e., Battery Meters, Switchboard Meters, Tramcar Meters.--General Principles of Single-and Polyphase Induction Meters.--Single-phase Induction Meters.--Polyphase Meters.--Tariff Systems.--Prepayment Meters.-- Tariff and Hour Meters.--Some Mechanical Features in Meter Design. --Testing Meters.--Index. “An earnest and successful attempt to deal comprehensively with modern methods of measuring current or power in electrical installations.”--_Engineering._ “Trustworthy information.... We can confidently recommend the book to every electrical engineer.”--_Electricity._ * * * * * ELECTRIC SMELTING AND REFINING. BY DR. W. BORCHERS AND W. G. MCMILLAN. SECOND EDITION, Revised and Enlarged. 21s. net. * * * * * ELECTRO-METALLURGY, A TREATISE ON. BY WALTER G. MCMILLAN, F.I.C., F.C.S. SECOND EDITION, Revised and in Part Re-Written. 10s. 6d.