C6io) 
whtt a ftronger or more lafting Comprcfliofl may do in this 
Cafe , I had not opportunity to try. 
2, T'he next ufflikemfs to be taken notice of beirvixt Rotten 
Wood an^l A Kindled Coal , is ^ That the Utter mil in very 
few minutes he totally extinguifht by the with dr awing of the Air^ 
•whereas a piece of Shining Wood , being eclipfed bf the abfence 
of the Air ^ and kef t [o for a time ^ will immediately recover Jts 
Light , if the Air be let in upon it again within half an hour after it 
was fir (I with drawn. 
The former part of this Obfervation is eafily proved by the 
Experiments , that have been often made upon J^ick Cods 
in the Pneumatical Engine \ and the truth of the latter pare 
appea s by an Experiment about shining Wood made by us in 
oSfobsr laft. Neither is it unprobable , that if I had had conve- 
niency to try it , I (hould have found, that apiece of Shi- 
mng Wood deprived of its light by the removal of the ambient 
Air, would retain adifpofition to recover it upon the return 
of the Air , not onely for half an hour (which is all that I 
lately afferted ) but for half a day , and perhaps a longer 
time. 
5. The next difference to be mention d is y that a Live Coal 
being fut into a fmall'Clo[e' Glafs , mil not contiuue to burn for ve- 
ry many minutes 5 but a peceof S\\\mn% Wood wiU continue to fhine 
for fome whole dayes. 
The firjl part of the Affertion 1 knowyou will readily grant, 
and the rather , bscaufe it concaias matter of fad, without at 
all decerrnining , whether the Coals not continuing to burn, 
proceeds from its being , as it were, {lifted by its own fmoak 
and exhalations ( v/htch can have no vent in a fmall-clofc- 
Gl'ifs^ or from the want of frefh Air, or from any particu- 
lar caufe , which I muft not here debate 5 though I have 
fometimes made Experiments fomewhat odd to facilitate that 
enqiiry. The other fm o( our Obfervation may be eafily 
made out by what I tried upon Shining Wood ^ fealed u,p Her- 
metically in very fmall Ghfles , where the Wood did for fe- 
veral dayes ( though I remembtr'' not precifely how many ) 
retain its Light, 
4. 
r 
