FRANKLIN S. EDMONDS, A. M., _Assistant Professor of Political Science, Central High School, Philadelphia_. THE CENTURY’S ADVANCES IN EDUCATION.
THOMAS J. LINDSEY, _Editorial Staff Philadelphia “Evening Bulletin.”_ “THE ART PRESERVATIVE.”
GEORGE A. PACKARD, _Metallurgist and Mining Engineer_. PROGRESS IN MINES AND MINING.
JOHN V. SEARS, _Art Critic Philadelphia “Evening Telegraph.”_ ART PROGRESS OF THE CENTURY.
J. MADISON TAYLOR, M. D., AND JOHN H. GIBBON, M. D., _Surgeons Out-Patients Departments of Pennsylvania and Children’s Hospitals_. THE CENTURY’S ADVANCE IN SURGERY.
FRANK C. HAMMOND, M. D., _Instructor in Gynæcology, Jefferson Medical College_. PROGRESS OF MEDICINE.
E. E. RUSSELL TRATMAN, C. E., _Assistant Editor of “Engineering News,” Chicago, Ill._ EVOLUTION OF THE RAILROAD.
LUTHER E. HEWITT, L. B., _Librarian of Philadelphia Law Association_. ADVANCE IN LAW AND JUSTICE.
MICHAEL J. BROWN, _Secretary of Building Association League of Pennsylvania_. PROGRESS OF BUILDING AND LOAN ASSOCIATIONS.
REV. A. LEFFINGWELL, _Rector Trinity Church, Toledo, O._ EPOCH MAKERS OF THE CENTURY.
I. AT THE DAWN OF THE CENTURY:—Earliest Observations on Electricity —Study of Amber—Earliest Electric Machines—Conduction of Electricity—The Leyden Jar—Franklin’s Discoveries. II. NEW NINETEENTH CENTURY ELECTRICITY:—Galvanism—The Voltaic Pile —Davy’s Arc-light—The Electro-magnet—Faraday’s Discoveries —The Induction Coil—Fields of Force. III. THE TELEGRAPH:— First Successful Telegraphy—The Morse System—Improvements in Telegraphy—Ocean Telegraphy. IV. HELLO! HELLO!—Invention of the Telephone—Principle of the Telephone—Transmitter and Receiver—Uses of the Telephone—The Phonograph, Gramophone, and Graphophone. V. DYNAMO AND MOTOR:—The First Motor—Perfection of the Dynamo—How it generates Electricity—Principle and Uses of the Motor. VI. “AND THERE WAS LIGHT:”—Various Lights of the Past—Era of Electric Lighting—Arc and Incandescent Lamps —Principles of Each—Value of Electric Light. VII. ELECTRIC LOCOMOTION:—Passing of the Horse and Traction Car—Introduction of the Trolley—Features of the Electric Railway—The Storage Battery and Horseless Carriage. VIII. THE X RAY:—Discovery of —What the X Ray is—Photographing by Means of the X Ray. IX. OTHER ELECTRICAL WONDERS:—Electric Clocks—Electrotyping and Electroplating, etc. X. ELECTRICAL LANGUAGE 19–54