Transmission Line Formulas. For Electrical Engineers and Engineering Students. H. B. Dwight, A.M.Am.I.E.E. 143 pages. 28 Diagrams. 12/6 net.

Electric Cooking, Heating, Cleaning, etc. Being a Manual of Electricity in the Service of the Home. “Housewife” (Maud Lancaster). Edited by E. W. Lancaster, A.M.Inst.C.E., M.Inst.E.E. Fully Illustrated. 338 + x pages. Demy 8vo. 4/- net.

Electric Mechanism. Part I. Single-Phase Commutator Motors. F. Creedy, A.C.G.I., A.M.I.E.E., Assoc. Am.I.E.E. Demy 8vo. 7/6 net.

Industrial Electrical Measuring Instruments. Kenelm Edgcumbe, M.Inst.C.E., M.I.E.E. Demy 8vo. 430 pages. 260 Illustrations. 16/- net. 2nd Edition, entirely Re-written and Enlarged.

Contents.—Errors and Accuracy. Constructional Details. Measurement of Resistances and Insulation. Potentiometers. Standard Methods of Current and Pressure Measurement. Moving Iron. Moving Coil. Hot Wire. Induction and Dynamometer Ammeters and Voltmeters. Electrostatic Voltmeters. Power Measurement. Dynamometer, Induction, Electrostatic and Hot-wire Wattmeters. Idle or Reactive Component Meters. Phase or Power Factor Meters. Phase Rotation Indicators. Frequency Meters. Fault and Leakage Detectors. Synchronising Devices. Pyrometers. Instrument Transformers. Graphic or Recording Instruments. Electrical Speed Indicators. Oscillograph and other Wave Form Indicators. Live Main or Charge Indicators. Earth-plate Testing Sets. Rail-bond Testing Sets. Cell-testing Voltmeters. Motor-Car Voltmeters and Ammeters. Voltage and Current Relays. Measurement of the Starting Current of a Motor. Paralleling. Compensated and Crest or Peak Voltmeters.

Calculation of Electrical Conductors. W. T. Taylor, M.Inst.C.E. Imperial 8vo. 32 pages. Diagrams in the Text. Chart at the end. 10/6 net. The Chart sold separately, 2/- net.

Solenoids, Electromagnets and Electromagnetic Windings. Charles Underhill, A.M.A.I.E.E. 346 pages. 218 Illustrations. Demy 8vo. 2nd Edn. Revised. 10/6 net.

Switches and Switchgear. R. Edler. Translated, Edited and Adapted to English and American Practice by Ph. Laubach, A.M.I.E.E. Fully Illustrated. Demy 8vo. 16/- net.

Contents.—General Remarks on the Design of Switchgear. Connecting Leads. Cable Sockets. Connections. Copper Bars. Contact Blocks. Bolts. Contact Springs and Brushes. Carbon Contacts. Devices to Eliminate Sparking at the Main Contacts. Switches and Change-over Switches for Low Pressure and Medium Pressure. High Pressure Switches. Fuses. Self-Acting Switches (Automatic Switches). Starting and Regulating Resistances. Controllers.