IV. A letter from Mr. Stephen Gray to Dr. Mortimer, Secr. R. S. Containing a farther account of his experiments concerning electricity

Abstract

Sir, Since my last (Nº 422) wherein I gave an Account of my Experiments, shewing Water will be attracted by Electrick Bodies, and that it may have an Electrick Vertue communicated to it, so as to attract solid ones, I have been upon another Enquiry; Whether there might not be a Way found to make this Property of Electrical Attraction more permanent in Bodies? How far I have succeeded in this Attempt, will appear by the Experiments I have made on the several Bodies mentioned in the following Catalogue; and as they were all of them prepared after the same manner, excepting Numb. 18 and 19, which shall be described afterwards, a general Description of the Method of preparing and preserving them in a State of Attraction, may suffice.