574 --. -■— ---^:--^ :? TEi. ivxi^zj^r academy. 



r^f Ir "1 r- :: tie xy ^a&e, H must be 



T — tlie corva At every 



„ ry OMnmon tC' anr rsro 



_ :o Hs' If the owl drcoit is 



E = ^^ - =^^ \\~-^ \ij-iy, (37) 



- " - " :i of c»e filamptit. 



T in dneetMHi and 



zis do not affect in 



K £.- -. E ir has 1- r-s: in the scdenoid, the 



er ^ " Us from 4 -JVZT ?r 



tt' "_T • - T of eTery filament, 



and ^ 1 



(^) 



>^' = T^'i -: '- -j-ri S (39) 



4^- - - ■ ^' 



iL r-err ->■- --- .ir :^.'^ - h: le :-:r:ieT of the croes-aection of 



- ' - - z hz.z y ax5i are rwo sides of the aeetkn ; it and 



if Te d:^ :' ejqnatioii i'3^) "witii respect to 



-"i- -:— - '; -"' ^ ^^ ---section of a filament, 



- . - re, at the time t, of the 



?J J Of •^•^- A.x'c*^ ,^, (2^ + l/(2it ^ 1/ 



*^ 4pF„ ^^ 



^:r*r2 



/ Kajs the saane maximxzm vaJue for aUralties 



of r ^c, <■"), 3/ has the same numerical 



ihat t' <■'* = ^", r"*, provided /i has the 



m both eases. The smaller the values of /* and c the sooner 



:- - — - :- -en value. At f = 0, when the 



1 at all points, the av^age Talae 



