for that case here, also permits the elimination of the parameter 
“Charge weight" in expressing all distances in charge radii. The 
desired group of boundaries can be derived from Fig. 5 in putting 
the center (charge location) in different charge depths ad and in 
P SURFACE 
F/NAL BOUNDARY. 
FOR 
SURFACE DISTORTION 
ay 
Fig. 5) is turned‘ 
with charge as \ » \ 
center until it \ \ 7 
touches the surface \ \ 
(point P) \ S 
\ 
turning the construction Fig. 5 until the boundary curve given 
there just touches the surface. The group of boundaries obtained 
that way are plotted in Fig. 6. 
23 
1451 
