(58?) 
rather greater, than at all leffe, tlan before it was put Into the 
Receiver . Bat partly for greater certainty, and partly to enjoy fo 
delightful a fpeilacle, we repeated the Experiment with the like 
faccefs as at firft. Wherefore being defirous to fee how foon 
thefe changes might be produced, we included the W ood in t 
very (mall RcctWct oi clear glafs, and found. That ia this the 
Light would begin to grow taint at the faond^ or atleaftacthe 
third Exfu6lion of the Air, and at the ftxth or fcventh would 
quite difappear. And we found by a Minute- watch, that the 
fending the Candles cut of the room, the pumping out the Air 
till the Wood would fliine no niore^ the re-admittmgof the^^ir 
f upon which it would in a trice recover its Light) and the fend- 
ing in for the Candles to confult the Watch, did in all take up but 
fix Minutes. 
Experiment IIL 
THe foremeotioned Experiment ^ without taking notice 
how long It lafted, being reiterated twice in this new Re- 
ceiver, we had a defire to fee, whether this Luminoufnefs of our 
Wood would more refembk a Coal, or the Life cf a perfeSf Ani- 
mal^ in being totally and finally excinguiftit, in cafe the Ait wers 
kept from it a few minutes^ or elfe the Life of hft-^s^ which in 
cur exhaufted Receiver I had obferved to lofe all appearance of its 
continuing, and that for a much longer time than a few minutes, 
and yet afterwards, upon rfee reftitution of Air, to recover pre- 
fently, and (hew manifeft figns of Life if Wherefore having 
exhaufted the Receiver^ till the Wood quite dif-appeared, we 
flayed fomewhat dbovQZ quarter of an hour in the dark, without 
perceiving, that the Wood had regained any thing of Light, 
thoughabouttheendofthis time we made the place about it as 
dark as we could-, and then it being too late at night to protra£l the 
Experiment, we let in the ^ir, upon whofe admiffi^n the Wood 
prefently recovered Light enough to be confpicuous at a di- 
ftance though it feesied to me fomewhat lefs vivid than before : 
which yet may be either a weiknefs in my fight, or an elFcd of 
the fteamsof the Cem£nt,unfriendly perhaps to the Luminoufncfs 
of the Wood. 
Thus far we proceeded jeBer-mgk, to which we this night added thefe 
Ohfervations, 
P p p 2 We 
