downy feathers, and immediately, as I expected, they left their preceeding poſture, and applied themſelves to it as if it had been an Electrical Body. And whether I offered to them my nail, or the pulpy part of my finger, or held my finger towards the right hand or the left, or directly over, theſe downy feathers that were near the little Quill did nimbly, and, for ought appear'd, equally turn themſelves towards it, and faſten themſelves to it. And to ſhew that the ſteams that iſſued out of ſo warm a Body as my finger were not neceſſary to attract (as men ſpeak) the abovementioned feathers, inſtead of my finger, I applied to them, after the ſame manner, a little Cylindrical Inſtrument of Silver, to which they bowed and faſtened themſelves as they had done to my finger, though the tip of this Inſtrument were preſented to them in ſeveral poſtures. The like ſucceſs I had with the end of an Iron Key, and the like alſo with a cold piece of poliſh'd black Marble; and ſometimes
the
