Rev. J. Edwards on Metal for Telescopes

I shall feel obliged if any of your correspondents can inform me where I can find a paper, called, "Directions for making the best Composition for the Metals of reflecting Telescopes, and the Method of grinding, polishing, and giving the great Speculum the true parabolic figure," by the Rev. John Edwards, B.A. I saw it some years ago in an old journal or transactions, but Capt. Cuttle's maxim not having been then given to the world, and being now unable to make a search, I avail myself of your valuable publication.