[ is ]

p, 20.) that the ..electric particles freely pervade the most solidbodies (and I believe there is no substance through which theycannot pass); we must therefore look out for a more rationaltheory than that of positive and negative electricity, to accountfor the attraction and repulsion of light bodies.

Without admitting any more causes of natural things thanhave already been conjectured, or proved, by Newton, Boyle,Boerhaave, and many more, who have not only been diligent en-quirers, but great investigators of the laws of nature, I shallendeavour to prove, as far as experiments will carry us, thatthe electric, like the magnetic particles, have an attractive andrepulsive power, or polar virtue, inherent in them 1 s .

Experiment!.

To flow, that two pith-balls, suspended by flaxen threads from the end's ■of a wire staple, and eleSirified, repel each other, like two-needles-(See exp. VIII. p. 67.) -

Fix the end of the metal rod, eighteen or twenty inches long,Into the conductor (fee fig. 16, plate I.) To the other end of therod, six on a staple b of metal, and from each end of tire staple

M Clare’s Motion of Fluids, p. 273.--I’t is not improbable, but that there may be

a polarity in many other parts of matter, as well as in the magnet and iron, in whichthey are certain, and incontestible. That there is such a property in several fixedand crystalizeddri tS i > s pretty apparent,, by their always ranking and disposing them-selves in one certain unalterable manner,, as often as they are reduced, from a fluid toa fixed state.

suspend