1 04 Vegetable Staticks. 



firong attractive power when they lie con- 



fjfed. 



That the particles of wood are fpecifical- 

 ly heavier than water, ( and can therefore 

 ftrongly attract it) is evident, becaufe feveral 

 forts of wood fink immediately; others 

 (even cork) when their interfaces are well 

 foaked, and filled with water: As Dr. Def- 

 aguliers informed me, he found a cork 

 which had been fealed up in a tube with 

 water for 4 years, to be then fpecificaJly 

 heavier than water ; others ( as the Peruvian 

 Bark) fink when very finely pulverized, be- 

 caufe all their cavities which made them 

 fwim, are thereby deftroyed. 



In order to try the imbibing power of 

 common wood allies, I filled a glafs tube 

 c r /, 3 feet long, and -J of an inch diameter, 

 (Fig. 16.) with well dried and lifted wood 

 allies, prefnng them clofe with a rammer; I 

 tied a piece of linen over the end of the 

 tube at t\ to keep the allies from falling out; 

 I then cemented the tube c faft at r to the 

 Aqueo-mercurial gage r z ; and when I had 

 filled the gage full of water, I immerfed it 

 in the ciilern of mercury X $ the 1 to the 

 upper end of the tube c y at o } I fcrewed on 

 the mercurial gage a b % 



The 



