188 



E. I. Terekhin 



00 



+ 



i(pn-l+2) 00 



{2nh - 2 Ao) 2 I//-2 + {2nh + 2 Aq) ■ 

 cos ncpj' cos 7199/ 



+ 



+ 



In agreement with the obtained expression for the potential, we find an 

 expression for apparent resistance for a symmetrical 4-electrode AMNB 

 or a 3 -electrode AMN apparatus, at the bottom of the water: 



^M = 2 ^« 



1 + 26 



L 



'"- 2j \r^ + {2r 



•f&o 





(_l)n^3 



|(p«-l + 2) 00 



ET~^ r" cos 7 



7Z9?y 



;=3 n=l 



[r2+(27^/7)2]3/2y [7-2+ (2Ao)"] 



13/2 



^^2j \\r'^+{2nh-'. 



[r2+(27l/i-2/2o)2]3/2 [7-2+ (271/1+ 2/20) T^2 



n = l 



\{pn-l + 2) 00 



(-l)"r 



n r3 



(_l)n^3 



[r2+(27^/i-2/7.o)2]3/2 ' [;-2+ (271/2+ 2Ao)2]3/2 



+ 



+ 



;=3 



r"* cos 7Z97y 



z'* cos 7799^ 



^^ \ [7-2 + (27l/l-2/7o)2]3/2 [;-2 + (2,z/i + 2h^Y] 



3/2 



5(P72-l+2) 



Since 2 ^y = I5 then, introducing symbols for the coefficients of 

 recession, we have 



^M=l^o[6i(l + 2|;^/,j + 6,|l + 2j^(-ir/, 



5(pn-l + 2) / 00 \ / CO 



+ 2 ^- l + 2S/„COS7Z9./ +6J/^„+2(^n-p.+ ^n+p„)) + 



+^2(^p.+S^(-lr(/n-p„+Wp.)]+ 

 |(pn-l+2) / 00 



+ 2 ^- Ko + 2 cos 779^/ (/„_p^ + /„+ J 



;=3 



(31) 



