Within a few years several methods had been proposed by different inventors, but none was at first very successful, not from any fault in the principle, but because the effect of electrostatic capacity of the line was left out of account in the early arrangements.
Utilizing this principle many inventors have devised forms of electrostatic voltmeter.
Pick machines have also been introduced by Jones and Levick, Bidder, and other inventors, but their use is now mostly abandoned in favour of those working continuously.
Although inventors had more or less clearly grasped these principles they were first embodied in practice in 1900 by G.
He goes on to attribute the world's science and civilization to pagan inventors; but it is not clear whether in this he is alluding specially to the culture of his own city.