10 
MR. AIRY’S SUPPLEMENT TO A PAPER “ ON POLARITY, ETC.” 
Curves representing - by their ordinates the values of cos 2 (w — 
Values of w. 
-iso 
R = 2 nit 
R = 2 ntf + 60° 
R = 2wtt + 120° 
90 
rn i i t* 
+180 
R = 2 nt + 180° 
, rTTTTTr>i' — ^ 
R = 2 nit + 420° 
R = 2 n it + 480° 
■i <rrrrm>r 
R = 2«tt + 540° 
R = 2 ntt + 600° 
R = 2 W7T + 660° 
-MO 
•r&O O +90 
Values of w. 
+ 180 
to| 
