Fe get able S lauds. 





» 



f 



97 



pulverized, becaufe all their cavities, which 

 made them fwim, are thereby deflroycd. 



In order to try the imbibing power of 

 common wood afhes, I filled a gl a fs tube 

 t r i, 3 feet long, and J of an inch diameter 

 (Fig. 1 6.) with well dryed and lifted wood 

 afhes j preffing them elbfe with a rammer, I 

 tyed a piece of linen over the end of the 

 tube at i, to keep the afhes from falling out; 

 I then cemented the tube t fad at r to the 

 Aqueo- mercurial gage r z 7 and wheri I 

 had filled the gage full of water, I immef- 

 fed it in the ciftern of mercury x: Thcri 

 to the upper end of the tube c, at I fcrcwed 

 6n 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 z ; but the three following days M 



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



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



ftfigl The higheft it rofe was 7 inches* 



which was equal to railing water 8 feet 

 nigh. 



This had very little effed on the met- 

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

 would rife a little, viz. an inch 6r little 

 *»ore in the gage at a, as it were by the fee* 



** tloti 





i 







