FORE:Whilst these scenes were going on all around, and the city was menaced every moment by troops, by the raving multitude, and by whole squadrons of thieves and assassins, the electors were busily employed in organising a City Guard. But, previous to entering on this task, it was necessary to[364] establish some sort of municipal authority more definite and valid than that of the electors at large. A requisition was then presented to the provost of trades (prv?t des marchands) to take the head. A number of electors were appointed his assistants. Thus was formed a municipality of sufficient powers. It was then determined that this militia, or guard, should consist of forty-eight thousand men furnished by the districts. They were to wear not the green, but the Parisian cockade, of red and blue. Every man found in arms, and wearing this cockade, without having been enrolled in this body by his district, was to be apprehended, disarmed, and punished. And thus arose the National Guard of Paris.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 electrifiedor, 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.
