premises at Soho, apparently taken by some such process.[11] In like manner the invention of the electric telegraph, supposed to be exclusively modern, was clearly indicated by Schwenter in his Delasements Physico-Mathematiques, published in 1636; and he there pointed out how two individuals could communicate with each other by means of the magnetic needle. A century later, in 1746, Le Monnier exhibited a series of experiments in the Royal Gardens at Paris, showing how electricity could be transmitted through iron wire 950 fathoms in length; and in 1753 we find one Charles Marshall publishing a remarkable description of the electric telegraph in the Scots Magazine, under the title of 'An expeditions Method of conveying Intelligence.' Again, in 1760, we find George Louis Lesage, professor of mathematics at Geneva, promulgating his invention of an electric telegraph, which he eventually completed and set to work in 1774. This instrument was composed of twenty-four metallic wires, separate from each other and enclosed in a non-conducting substance. Each wire ended in a stalk mounted with a little ball of elder-wood suspended by a silk thread. When a stream of electricity, no matter how slight., was sent through the wire, the elder-ball at the opposite end was repelled, such movement designating some letter of the alphabet. A few years later we find Arthur Young, in his Travels in France, describing a similar machine invented by a M. Lomond of Paris, the action of which he also describes.[12] In these and similar cases, though the idea was born and the model of the invention was actually made, it still waited the advent of the scientific mechanical inventor who should bring it to perfection, and embody it in a practical working form.