[64] The discoveries of the late ingenious Mr. Symmer, on the
positive and negative electricity produced by the mutual friction of
white and black silk, &c. afford hints for farther improvements to be
made with this view.
[In Mr. Collinson's edition, several papers followed here, by
the Abbé Mazeas, and others, upon the subject of Dr. Franklin's
experiments, which, that the letters of our author might not be too
much interrupted, we have thought proper to transfer to an Appendix.
A subsequent paper by Mr. David Colden, entitled Remarks on the Abbé
Nollet's Letters to Benjamin Franklin, esq. on Electricity, will be
found transferred in the same manner.]