Account of Some Experiments in ElectricityIn a Leter from MrWilliam Swift to the RevDrKing, FRS. . ikes with confiderabie force againft thefixed one, emitting a fpark or flafh at the fame time. In fuch pofition if a point be put the vibrations of thefwinging ball will immediately begin to leflen, and itfoon becomes intirely at reft, no flafh or fpark happen-ing from the inftant the point is put there. 9. On one of the knobs or balls at the end of the poleddy I put a point turned downwards towards the con-ductor, and as foon as the cylinder moves it is thrownupwards or repelled, and the oppofit
Account of Some Experiments in ElectricityIn a Leter from MrWilliam Swift to the RevDrKing, FRS. . ikes with confiderabie force againft thefixed one, emitting a fpark or flafh at the fame time. In fuch pofition if a point be put the vibrations of thefwinging ball will immediately begin to leflen, and itfoon becomes intirely at reft, no flafh or fpark happen-ing from the inftant the point is put there. 9. On one of the knobs or balls at the end of the poleddy I put a point turned downwards towards the con-ductor, and as foon as the cylinder moves it is thrownupwards or repelled, and the oppofite knob or ball ad-heres to the conduftor under it; but when points are puton both knobs and turned downwards or towards theconductors, the pole dd will remain unmoved, notwith-ftanding all the poflible fri&iori which can be given byturning the cylinder. io. To render thefe experiments more analogous tothe natural phenomena of lightning and rain defcendingfrom the clouds, I place a veflel of water infulated, andas the clouds (fig, 2.) being charged pafs along the frame, —?MM—I— fr sphiltrans03430864. 7
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