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Rh long with them uch light bodies as they meet with in their way. On occaion of which Hypotheis I hall offer it to be conider'd, Whether by the gravity of the Atmopherical Air, urmounting the Specifick Gravity of the little and rarifi'd Atmophere, made about the Amber by its emiions, and compriing the light Body faten'd on by them, the Attraction may not in divers caes be either caued or promoted.

Another Hypotheis is that propoed by that Ingenious Gentleman Sir Kenelm Digby, and embraced by the very Learned Dr. Browne, (who eems to make our Gilbert himelf to have been of it) and divers other agacious men. And according to this Hypotheis, the Amber, or other Electrick, being chaf'd or heated, is made to emit certain Rayes or Files of unctuous Steams, which, when they come to be a little cool'd by the external air, are omewhat condens'd, and having lot of their former agitation, hrink back to the body