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pole, it will attract: it, but it will repel the north pole ; but thetwo ends of the wire will attract the north pole, and repel thesouth r .

Take two long slight steel needles of equal lengths, suspendone from each end of the wire staple, while it is hanging bythe middle at the magnet. Try to bring 'the two extreme endsof the needles in contact, by putting one towards the otherwith your finger; as soon as you bring them within a certaindistance, the needle which you do not touch will recede; whenit cannot get any farther, if you try to bring the point of theneedle upon it, it will slip by in an oblique direction, andwithout force they cannot, no more than the electrified pith-balls, be brought into contact,

E x p e R r m~ e n T IX. in EleSlricity,

To Jhew that two charged jars a& from the fame principle as thethreads and pith-balls, in the foregoing experiments.

Make two vanes of gilt paper,. about two inches long, and aninch wide, with sockets to turn freely on perpendicular spindles,screwed on upon the wires of the jars. When the two jars arefixed with each of them a vane, place both the jars at either ofthe conductors, and charge them. Take the jars, when charged,from the conductor, and place them upon the table, with thevanes in a parallel direction, and between two or three inchesapart j the vanes will mutually repel each other, like the threads,

* Rohault’s System of Natural Philosophy, p. 165. v. ii.

The point of the needle does not turn itself to that part in the horizon whichthe pole it is touched with turns to, but to the opposite part. For instance, ifone end of a needle touches the south pole of the loadstone, that end will turntowards the north.

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