Important Effect on Modern War Mr. H. F. Trewman, Chief Instructors, Electrical Branch, Ordnance College, lectured at the Royal Artillery Institution, Woolwich, recently on "Wireless Telephony." Colonel Craig, who was in the chair, introducing the lecturer, referred to the very important effect of wireless telephony on modern war, especially the artillery side of it.
Mr. Trewman's interesting lecture was illustrated by numerous diagrams and photographs, shown by the magic lantern, and he made very clear to an appreciative audience the various steps since 1838, by which man came to the knowledge that oscillations communicated to the ether by an electric current could be transmitted and picked up again, and how the sound waves made by the human voice could be_ translated into electric waves, and then translated back again into audible sound waves after being carried great distances. It was no longer cor-
Text read from the printed page and cleaned; old type leaves the occasional error.