A Table according to the 
Scheme of the P lanes o - 
pcned to an Jingle of 40 
Minutes , in Fig. 6. 
A Table according to the 
Scheme of the Planes 0- 
pened to an Angle of 20 
Minutes , in Fig. 7. 
Diftances in In- 
«hes and Parts 
of Ir.ches from 
the touching 
Ends. 
Number of 
Lines elevated 
at the feveral 
Diftances. 
Diftances in In- 
chei and Parts 
of Inches from 
the touching 
Ends. 
Number of 
Lines elevated 
at the feveral 
Diftances. 
I. 
3 * 
4?- 
6 . 
75 * 
10. 
12. 
x 5 * 
19: 
28. 
50. 
?• 
31 - 
5- 
6 |. 
9 * 
1 2. 
153* 
1,8. 
21 2- 
27 *- 
& 
5°. 
7 6 * 
XI. A 
/ 
