54 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



0,^2 



•B 



A* 



*1 rf 



e^z b:c <ur-5 D , ^oV r 



a 1000* z,= 2.00 o m ' 8o<r\ l 



E- 2 — F 









14" *• 



tV> — > -> 



-»*•' + 

 *. — - 



5 



A 9, = z gc ei.vs djem^ | e, = 2 Bjc e^i-y de*,* t 



'\ Z, = 1000" ^=2000" t,-.iSW x * t l -f000* ^iOO0~ lflMO" * 



44 247 



O-ZZbOO + yUCT 



F" 



A 



^o-96ro JJ? 5- 3J * 



G G G' 



Figure 8. Composition of three sections of different surge-resistances. 



The architrave resistance is then, following (49), 



„ ■ i « cosh 8 C cosh 8 E 



o" = d sinh 8 A X — v-f X — v-~ 



cosh 6 S cosh o D 



, ~ ■.„„ , n cosh 2.158,924 

 = 1000 cosh 2.567,48 X - _' , 



ohms (77) 

 cosh 0.5 



sinh 0.567,48 cosh 0.658,923,6 

 = 44,247 ohms. 



The sending-end resistance at A is, as in (47), 



R gA = Zi tanh 8 A ohms (78) 



= 1,000 coth 2.567,48 = 1,011.84 ohms 



The conductance of the n leak at A is, as in (50), 



g\ = l/R gA - 1/p" mhos. (79) 



