⚫ are fixed in a circular ftand, round the wheel. When this wheel is well charged, the bullets on its edge being differently electrified, attract and repel the thimbles alternately, and thereby give the wheel a motion that increases continually, till it goes more than 20 turns in a minute, and the motion will continue half an hour. The celerity of this wheel may be increased by an additional number of bullets. RECREATION X. p. 65 The magician's chace. A wire is placed perpendicular to the branch, and on the top of it turn feveral horizontal wires, the points of which are bent in oppofite directions, and on them are fixed the figures of men, horfes, hounds, &c. When these wires are electrified they will turn fwiftly round, and the figures will feem to purfue each other. This Recreation may be improved by another fet of wires, placed placed over the former; or by giving the figures a progreffive, as well as a Six concentric hoops of metal are fufpended from the branch; under and near to them is placed a metal plate, on which are put glafs bubbles, between the hoops; these bubbles correspond to the planets, the hoops to their orbits, and a ball hung over the center of the hoops reprefents the fun. When the hoops are electrified the balls will moye round them, and the motion will continue as long as the operator thinks fit. RECREATION XII. The incendiaries p. 69. A person standing on a cake of wax holds a chain that is connected with the branch, and putting his finger into a dish containing fpirit of wine, it will A perfon holding a chain that is joined to one of the hooks of the electric table, attempts to fix a wire on the other hook, when he inftantly receives a fhock through the body, without knowing from whence it proceeds. This Recre- ation may be diverfified by concealing the chain under a carpet on which a perfon treads, and by laying a wire cidentally take hold of it. Methods of communicating the fhock to a great number of perfons at the fame time P.73 RECREATION. XIV. P. 75 Magical explosions. Gunpowder is made up in the form of a fmall cartridge, in each end of which is put a blunt wire; the ends of these wires within the cartridge are about half an inch diftant. Two chains, that communicate with the two hooks in the electric table, being joined to the external ends of the wires, the electric fire will pass through the cartridge, with an inftant explosion. By a fimilar method brass or iron wire may be melted. RECREATION XV. Prifmatic colours. P. 78 A tin plate is placed between two wires that communicate with the two hooks VOL. III. S of of the electric table, and after many explofions three diftinct rings appear, each of which contains all the colours of the prism or rainbow. This experiment corroborates the Newtonian doctrine of colours p. 78 (note) RECREATION XVI. The artificial earthquake. p. 81 An edifice, compofed of feveral Icofe pieces, is placed on a board in the middle of a large bafon of water. A wire that communicates with the hooks in the table, being laid over the board and the furface of the water, they become greatly agitated by the explosion, and the edifice is laid in ruins. RECREATION XVII. p. 82 The electrical kite. This kite confifts of a large thin filk handkerchief, whofe corners are faftened to the |