"Tapper" Quotes from Famous Books
 ... clear to me that some one was at my window, though, seeing that my room was some twenty feet above the ground, I was at a loss to imagine how the tapper ...
— Humphrey Bold - A Story of the Times of Benbow • Herbert Strang
... influence of the spark setting up the Hertzian waves. Professor E. Branly, of the Catholic University of Paris, took up this work in 1890. He arranged metal filings in a small glass tube six inches long and arranged a tapper to disarrange the filings after they had been brought together under the influence ...
— Masters of Space - Morse, Thompson, Bell, Marconi, Carty • Walter Kellogg Towers |
