Vegetable Staticks. 97 



pulverized, becaufe all their cavities, which 

 made them fwim, are thereby destroyed. 



In order to try the imbibing power of 

 common wood afhes, I filled a glafs tube 

 c r tyi feet long, and | of an inch diameter 

 (Fig. 16.) with well dryed and fifted wood 

 allies; preffing them clofe \vith a rammer, I 

 tyed a piece of linen over the end of the 

 tube at /, to keep the allies from falling out 5 

 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 immeir- 

 fed it in the ciftern of mercury x: Then 

 to the upper end of the tube t, at I fere wed 

 on the mercurial gage a k 



The afhes as they imbibed the water drew 

 the mercury up 3 or 4 inches in a few hours 

 towards z 5 but the three following days it 

 rofe but 1 inch, f inch, and J, and fo lefs 

 and lefs, fo that in 5 or 6 days it ceafed rL 

 fing: The higheft it rofe was 7 inches, 

 which was equal to railing water S feet 

 high. 



This had very little efFeft on the mer- 

 cury in the gage a b y unlefs it were, that it 

 would rife a little, viz. an inch or little 

 more in the gage ztdi as it were by the fuc- 



H tion 



