(600)
Subject; and therefore I shall here conclude this Paper, as soon as l have added this Confimation, as well of what I last related, as of something that I observed before, That having included in small Receiver: two pieces of rotten Whitings, whereof the one, before it was put in, scarce shone so vividly, as did the other after the Receiver was exhausted; and having ordered the matter so, that we were able to keep out the Air for some days, at the end of about 48 hours, we found, that the more strongly shining Body retained yet a deal of Light; but afterwards looking upon them both in a dark place, we could not perceive in either any show of Light. Wherefore having let in the Air into that Receiver, where into the Body that at first shined the faintlier had been put, there did not ensue any glimmering of Light for a pretty while: nay, upon the rushing in of the Air into the other Glass (then also made accessible to the Atmosphere) the Body that at first shone so strongly, and that continued to shine so long, shewed no glimmering of Light. But being resolved to expect the issue a while longer, our patience was rewarded within less than a quarter of an hour with the sight of a manifest light in the Body last nam'd, and a while after the other also became visible, but by a Light very dim. The more luminous of these Bodies I observed to retain some Light 24 hours after; and the hitherto recited Experiment had this peculiar Circumstance in it, That at the two Receivers were uninterruptedly kept exhausted no less than 4 days, and as many nights*.*What method the noble Author of these Experiments used in keeping out the Air for so long a time will probably be made known e're long by himself.
An Account of two Books.
