Vegetable Staticks. 105 



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 it 

 rofe but 1 inch, \ inch, and -£, and fo lefs 

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

 rifing : The higheft it rofe was 7 inches, 

 which was equal to railing water 8 feet 

 high. 



Tins had very little effect 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 at a, as it were by the fuc- 

 tion of the afhes, to fupply fome of the air- 

 bubbles which are drawn out at i. 



But when I feparated the tube c from 

 the gage r z, and fet the end i in water, 

 then the moifture (being not reftrained as 

 before) rofe farter and higher in the afhes 

 c 0, and depreffed the mercury at a, fo as 

 to be 3 inches lower than in the leg b y by 

 driving the air upwards, which was inter- 

 mixed with the afhes. 



I filled another tube 8 feet long, and ~ 

 inch diameter, with red lead 5 and affixed it 

 in the place of c to the gages a b, r z, 

 The mercury rofe gradually 8 inches to z. 

 In both thefe Experiments, the end i was 

 covered with innumerable air-bubbles, many 



of 



