PROPAGATION BY LAYERING. 
\\' 
i f 
f 1 om 
f Sa \ oes 
; te | \) 
if ‘ . ‘ = i 
A \\ | , 
S . ig dip ~ Mi ! \ 
bene ‘ A Nh : : | 
: . : pp q | 
: . | . : i lf \ 
| . re 
<S NWA a Mh I 
iN f . | : \ 
is > ) f | i} ? 
: \ ; 
= \ “d . 
A a : 
- . : a. 
os sya Wi 
WE [= Au, if i 
s eh h \ | Mh hy 
, : \ i | 
= % 1 I 
= . X\ : 
0 = = | | | ) 
ay AT Sas ¢ 
\ - y 
ee 
=e -y 
LAO NY. / 
y 7, 
Y 
| ! 
FIG. 25.—Sce opposite page, also Chapter V. 
RI AY : 
Poy 
.) 
AYR 
Die 
