ELECTROMAGNETIC • DICCIONARIO INGLES.COM • Definition of Electromagnetic

... Myrin who answered. "I suppose you are all familiar with radium? It is nothing more or less than condensed sunlight, which in turn is simply electromagnetic waves; although it may take your scientists a good many centuries to reach ...

— The Lord of Death and the Queen of Life • Homer Eon Flint

... investigator in electrodynamics. He also invented a telegraphic arrangement in which he used the magnetic needle and coil and the galvanic battery. Others, in the latter part of the eighteenth century and the earlier years of the nineteenth, devised similar arrangements. But no strictly electromagnetic apparatus for telegraphic signalling was put to successful use until 1836, when, in England, Charles Wheatstone, who is commonly regarded as the first inventor of practical electric telegraphy, constructed an apparatus whereby thirty signals were transmitted through nearly four ...

— The Great Events by Famous Historians, Vol. 17 • Charles Francis Horne