i/tg€tahk Siatich. 5)7 
pulverized, bccaufe all their cavities, which 
made them fwim, are thereby deftroyed. 
In order to try the imbibing power of 
common wood adies, 1 filled a glafs tube 
c r tyi feet long, and | of an inch diameter 
(Fig. 1 6.) with well dryed and fifted wood 
afhcsj preffing them clofe with a rammer, I 
tyed a piece of linen over the end of the 
tube at /, to keep the afhes from falling oat > 
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 immer-* 
fed it in the ciftern of mercury x: Then 
to the upper end of the tube f, at I ferewed 
on the mercurial gage a b. 
The afhes as they imbibed the water drew 
the mercury up 3 or 4 inches in a few hours 
towards ^ ; but the three following days it 
rofe but i inch, i inch, and and fo lefs 
and lefs, fo that in 5 or 6 days it ceafed ri„ 
ling; The higheft it rofe was 7 inches, 
which was equal to raifing water 8 feet 
high; 
This had very little effed on the mer- 
cury in the gage a by unlefs it were, that it 
would rife a little, viz, an inch or little 
more in the gage as it were by the fuc- 
H tion 
