J. A. FLEMING, M.A., D.Sc. (Lond.), F.R.S. Professor of Electrical Engineering in University College, London; Late Fellow and Scholar of St. John's College, Cambridge; Fellow of University College, London. Author of "The Alternate-Current Transformer," "Radiotelegraphy and Radiotelephony," "Principles of Electric Wave Telegraphy," "Cantor Lectures on Electrical Oscillations and Electric Waves," "Hertzian Wave Wireless Telegraphy," etc.

F. A. C. PERRINE, A.M., D.Sc. Consulting Engineer; Formerly President, Stanley Electric Manufacturing Company; Formerly Professor of Electrical Engineering, Leland Stanford, Jr. University. Author of "Conductors for Electrical Distribution."

Cyclopedia of Telephony and Telegraphy, Vol. 2 — Part 5

A. FREDERICK COLLINS Editor, _College Wireless Bulletin_. Author of "Wireless Telegraphy, Its History, Theory and Practice," "Manual of Wireless Telegraphy," "Design and Construction of Induction Coils," etc.

Cyclopedia of Telephony and Telegraphy, Vol. 2 — Part 5

SCHUYLER S. WHEELER, D.Sc. President, Crocker-Wheeler Co.; Past-President, American Institute of Electrical Engineers. Joint Author of "Management of Electrical Machinery."

Cyclopedia of Telephony and Telegraphy, Vol. 2 — Part 5

CHARLES PROTEUS STEINMETZ Consulting Engineer, with the General Electric Co.; Professor of Electrical Engineering, Union College. Author of "The Theory and Calculation of Alternating-Current Phenomena," "Theoretical Elements of Electrical Engineering," etc.

GEORGE W. PATTERSON, S.B., Ph.D. Head of Department of Electrical Engineering, University of Michigan. Joint Author of "Electrical Measurements."

WILLIAM MAVER, Jr. Ex-Electrician Baltimore and Ohio Telegraph Company; Member of the American Institute of Electrical Engineers. Author of "American Telegraphy and Encyclopedia of the Telegraph," "Wireless Telegraphy."

JOHN PRICE JACKSON, M.E. Professor of Electrical Engineering, Pennsylvania State College. Joint Author of "Alternating Currents and Alternating-Current Machinery."

AUGUSTUS TREADWELL, Jr., E.E. Associate Member, American Institute of Electrical Engineers. Author of "The Storage Battery, A Practical Treatise on Secondary Batteries."

EDWIN J. HOUSTON, Ph.D. Professor of Physics, Franklin Institute, Pennsylvania; Joint Inventor of Thomson-Houston System of Arc Lighting; Electrical Expert and Consulting Engineer. Joint Author of "The Electric Telephone," "The Electric Telegraph," "Alternating Currents," "Arc Lighting," "Electric Heating," "Electric Motors," "Electric Railways," "Incandescent Lighting," etc.