Marconis wireless experiments
With Marconis interest fired with ideas of Hertzian Waves. He started by repeating the experiments of Heinrich Hertz who had discovered their existence. These experiments used a spark in a transmitting circuit to induce a second but smaller spark in a receiving circuit placed a short distance away.Like Hertz he only managed to achieve ranges of a few metres. Later he managed to improve the distance over which the spark could be detected by using a device called a coherer in the receiver. A Frenchman named Edouard Branly was the first to observe the effect behind the coherer and this was later improved and popularised by Oliver Lodge in its use for detecting Hertzian wave transmissions.