clear and conveniently fliaped Glafs, that the long Stem or Pipe 
being fo far filled with ^ickftlver^ as that there might be about 
half a fpoonful of Air iefe at the clofed Ead,where the Wood was 
placed, it might be inverted into a little Gh(soi Stagnant ^ick- 
ftlver^ and therewith conveyed into a (leader Receiver y out of 
which as the Air rtiould come to be pumped^ th^t included in the 
Glafs, which held the Wood, might be rarificd, and afterwards 
upon the admiflion of the outward ^ir (which muft impell up the 
^uickfilver to its former height) might be reftored to its former 
ftace. But when we came to make trial of this, we had no Recei- 
ver conveniently fliaped, that was fo clear and thin, as that we 
coald fee the Wood ftiine through both the Glaffes, /4nd though 
we would for an Expedient have fubftituted t fine thin j^ladder, 
wherein the Wood waVto be put, and a convenient quantity of 
-^ir ftrongly tied up with it, yet for want of a ^laddei fine enough 
for our turn, that Expedient al fo proved ufelefs to us, ^at being 
defirous to make what trial we could by the Icaft unfit means, we 
had in our power, we got an old, bat thin Glafs, fealed at one 
eod^whofe fliape was pretty CjlindricalAtid whofe lore was about 
the bigr efs ofa mans little finger, and whofe length was about a 
foot or more. Into this Pipe near the fealed end we put a piece ot 
Shining Wood, wedged in with a piece of Cork to keep it from 
falling, and having inverted the nofe of it into another flendcr 
Glafs, but not CjlindricAU wherein was pretty fto.e of ^kkftU 
ver^ we put them both into a long Receiver^ (hapcd almoft like a 
€laf churn^ and having pumped awhil?, that the Air included 
in the Pipe, expanding it fclf, might deprefs the ^ickfihery and 
fo make efcapes into the Receiver^ts long as we thoua;ht fit ^ we 
then let in the outward Air, that the ftagnunt ^ickftlver might 
be impelled into the cavity of the Pipe now freea from raucli of 
the Air, to the height requifice for our purpofe. 
This done, we plied tha Pump again, and obferved, That, as 
the Air in the Pipe did by its own Spring exoand it felf more 
and more, and grow thinner and thinner, tht shining Wood grew 
dimmer and dimmer, till at length it ccafed to (hiae, the inter- 
nd y/irb^ing then got a good way lower, than the fiirface of 
the mer;;^/ Qoickfilver : whereupon opening the commerce be- 
We.ea the cavity of the Recciv,^r^ and thtAtmofphere.^iht Quick- 
lilver 
