Abstract
Having, on Thursday the 29 th of April last, made mention of some Experiments, concerning the Cohesion of two Balls of Lead, applied together in a small Part of their Surface (so as to require a Weight far greater than what will overcome the Pressure of the Atmosphere, to separate them) made by Mr. Trievall , at Newcastle , and at Edinburgh ; I made the following Experiment to the same Purpose, before the Royal Society .