Page:A hundred years hence - the expectations of an optimist (IA hundredyearshenc00russrich).pdf/126

 it into motion) and its use as a primary means of utilising the cosmic stores of force.

Before we arrive, therefore, at the point of using electricity as a source of power in itself, our mechanicians will have plenty to occupy them in the task of devising safer and more convenient methods of transmitting force, and even at the end of the century, supposing the use of electricity not to have been entirely superseded by the discovery of some entirely new force as yet not even conceivable, invention will doubtless be still busy with further improvements in the transmission as well as in the production of electricity. It has been hinted that "wireless" transmission of power will no doubt by that time have become practicable, and Signor Marconi's achievement of wireless telegraphy was mentioned as a proof that such transmission is at least imaginable. In Marconi's invention an enormous electrical impulse is launched into the ether, and if the very smallest token of it can be "picked up" in any way at the receiving station, the wireless telegram is satisfactorily received. But the important fact for our present purpose is that some product of the original impulse can be picked up: and though the effort of imagination required to see in this a starting-point for entirely new inventions, capable of gathering up a practicable modicum of the transmitted power in a form capable of being converted into motion,