180 



E. I. Terekhin 



We find 



5r 47C 



+ 2 >,^„ 



7-2 ■ (7-2 + 4V)^/= ^^'"[r^ + {2?ih)^YU_\ 



+ 



+ 



2j^" 



["on 3 / ~t~ 



[r2+4(/iA+Ao)']"^= [r2 + 4(7z/z-/io)2]V.J' 



(18) 



hence 



Qm = 



h^[ 



^"^lV2 + 4/l2)V= +22j?n-r. 



'+(27l/7)2]V= 



+ 



+ Ljin 



+ 



t{ M^' + Hnh+h.^!^ [7•2 + 4(7^/^-/^o)^]'/=/J 



(19) 



Representing -p-^ — r^ 



h 



+ 4, 



, the so-called coefficient of recession of 



the symmetrical apparatus AMNB, by l/^, we finally obtain 



M 2 



\ n=l / 



^^o[C+X!^n(C+po+^.-p„)l 

 L n=i -J 



(20) 



To obtain an expression for the apparent specific resistance for a bottom 

 radial apparatus, we use the known relationship (^) 



Qr = Q- 



r 9q 



Representing by q^j^j the apparent specific resistance of a radial apparatus 

 at the bottom of the water, without considering the change in the coefficient 

 of the apparatus during immersion, we obtain 



Qrj^j — Qm 2 * 9r 



(21) 



