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THREE:Lord George Murray then said that, as they needs must go, he proposed that they should enter England on the Cumberland side, so as to harass Wade's troops, if he marched across to meet them. The idea was adopted as a great improvement; it was kept a profound secret. Still further to mislead the English, Lord George proposed another plan, which was also adopted��to divide the army into two columns, to march by two different routes, but to unite at Carlisle. One of these was to be led by the prince himself by Kelso, as if intending to march straight into Northumberland; the other to take the direct road through Moffat. It was resolved to leave Lord Strathallan to command in Scotland, to take up his headquarters at Perth, receive the expected succours from France, and all such reinforcements from the Highlands as should come in.In electricity great strides were made. Between the years 1705 and 1711 Francis Hawksbee published in the Transactions of the Royal Society several experiments, in which he had, for the first time, discovered the production of the electric spark by friction, and electrical attraction and repulsion. In 1720 Stephen Gray, a pensioner of the Charterhouse, published the result of his experiments on this subject, with a list of the substances which showed electricity under friction; and in 1732 he discovered the conducting property of non-electrical bodies. Before 1739, Dufray, keeper of the King's Garden at Paris, discovered the repellent power of two similarly-electrified bodies, and the attraction of these positively and negatively electrified��or, as he termed it, possessing the vitreous and the resinous electricity. Cuneus and Lallemand discovered the mode of accumulating the electric fluid in what was called the Leyden jar in 1745. This discovery gave a new impetus to inquiry, and Nollet, in France, and Watson, in England, conceived the hypothesis of the jar being overcharged on one side and undercharged on the other. This growing perception of the positive and negative conditions of the electric fluid received confirmation from the experiments of Benjamin Franklin, in America. Franklin soon improved the Leyden jar into an electrical battery; and, in 1752, he proved the identity of electricity and lightning by his grand experiment of the kite. On this he recommended lightning conductors, which, however, were not used in England till ten years afterwards.