( 21 ? ) 
# 
I. A TABLE Jhewing the Altitude , to given 
Heights of the Mercury. 
Inches. 30 
0 
915 
28 
1862 
2 7 ' 
2844 
26 
386J 
25 
4912 
20 
l0 947 
*5 
*871? 
10 
• 2,96^2 
5 
48378 
1 
91831 
0 . 5 
u °547 
0 . 25* 
29 Miles or 
129262 
0 . 1 
I 5*4000 
0 . 01 
0 . 001 
41 Miles or 
53 Miles or 
216169 
278338 
II. A 
