io4 Vegetable Staticks. 
ftrong attractive power when they lay con- 
fix fed. 
That the particles of wood are fpecificah 
ly heavier than water (and can therefore 
ftrongly attraft it) is evident, becaufe feveral 
forts of wood link immediately; others (e- 
ven cork) when their interftices are well 
foaked, and filled with water: As Dr. ^De- 
faguliers informed me, he found a cork 
which had been fealed up in a tube with 
water for 4 years, to be then fpecifically 
heavier than water 5 others (as the Peruvian 
Bark) fink when very finely pulverized, be- 
caufe all their cavities which made them 
fwim, arc thereby deltroyed. 
In order to try the imbibing power of 
common wood afhes, I filled a glafs tube 
c ri, 3 feet long, and i of an inch diameter, 
(Fig. 16.) with well dried and fifted wood 
afhes, prefling them clofe with a rammer ; I 
tied a piece of linen over the end of the 
tube at i y to keep the allies from falling out; 
I then cemented the tube c faft at r to the 
Aqueo-mercurial gage r and when I had 
filled the gage full of water, I immerfed it 
in the cittern of mercury x ; then to the up- 
per end of the tube c , at 0 I fere wed on the 
mercurial gage a ho 
The 
