if Cy and Ty are independent of Z . Substituting (10), (12), and (12) 
into (9) and writing 
U4 +vv,= WW, 
(15) 
the two equations (9) can be combined into 
pee ee ee we yl =v 
(16) 
and the conditions to te satisfied along the boundaries now become 
Z 
We a /- coy (A /0,) 
“A Gh SG 46%) 
(17) 
and 
(2) 
W ae 
(18) 
The solution of equation (16) subject to conditions (17) and (18) is , 
Pe ora) 6 read ata 
or N27 \eosu.7 cork (Meme -*/D. ) 
TetiTG De buk(virane BZ) Lem(4p) 
Neer Av cork [Rare */0,) = X09) 
ays 
