Vol. I. page 182.
Plate I.
Published as the Act directs, April 1, 1806, by Longman, Hurst, Rees & Orme, Paternoster Row.
EXPERIMENT II.
Fig. 1. From a bent wire (a) sticking in the table, let a small linen thread (b) hang down within half an inch of the electrised phial (c). Touch the wire or the phial repeatedly with your finger, and at every touch you will see the thread instantly attracted by the bottle. (This is best done by a vinegar cruet, or some such bellied-bottle). As soon as you draw any fire out from the upper part, by touching the wire, the lower part of the bottle draws an equal quantity in by the thread.
EXPERIMENT III.
Fig. 2. Fix a wire in the lead, with which the bottom of the bottle is armed (d) so as that bending upwards, its ring-end may be level with the top or ring-end of the wire in the cork (e) and at three or four inches distance. Then electrise the bottle, and place it on wax. If a cork suspended by a silk thread (f) hang between these two wires, it will play incessantly from one to the other, till the bottle is no longer electrised; that is, it fetches and carries fire from the top to the bottom[29] of the bottle, till the equilibrium is restored.
EXPERIMENT IV.
Fig. 3. Place an electrised phial on wax; take a wire (g) in form of a C, the ends at such a distance when bent, as that the upper may touch the wire of the bottle, when the lower touches the bottom: stick the outer part on a stick of sealing-wax (h), which will serve as a handle; then apply the lower end to the bottom of the bottle, and gradually bring the upper end near the wire in the cork. The consequence is, spark follows spark till the equilibrium is restored. Touch the top first, and on approaching the bottom, with the other end, you have a constant stream of fire from the wire entering the bottle. Touch the top and bottom together, and the equilibrium will instantly be restored, the crooked wire forming the communication.