224 MircroGRAPHIA. 
The height ofthe The Expan- 
Cylinder of Mer- fion of the 
curythat,together Air, 
with the Elater of 
the included Air, 
ballanced the 
preflure of the} 
- Atmofphere, 
The height of 
the Mercury 
that counter. 
ballanc’d — the 
Atmofphere 
The ftrength 
of the Elater 
of the expan- 
ded Air, 
a ee maid 
30. 
28. 
had 
