236 O. h Broch 



— ^,;[vcV'os(y— X')— wli'cos(|x'— x')]tan3(kr— 5l+X'). 



= — ^,[vc'»iii(v'— X') — ivh'sn)(ix'—k')] 

 (421) — ^,[uc'cos(V— XO— ii^b'cos(|i.'— X';]tan^(kr— st+X'), 



=— ^„[vc'sin(V— X')— ivb'sin(iJi'— X')] — 



— ^„[vc'cos(^'-X')-it;b'cos([J.'-X0]tang;(kr-5t+X0. 



in(^4-«^)[(^csin(v— X) — ivbslnfp. — X))-]- 

 4-(vcco«(> — X) — ii;bcos((jL — X))tang(fcr— 51+^)] 

 +g,[(vc'*în(V— xO— îi^b'sin(jj.'— X0) + 

 -j-(i;c'cosO^'-X')-ti;b'cos(|J.'— X'))tang(kr-5t+X')]=:— ^^k^a', 

 (425) m,(E[(ucsin(v--x)— ivbsin(j;.— X)) 4- 



4-(vccos(v— x)— ivbcos({jL — X))taiig(kr — st — X] -{- 



+(®„+s2)[(uc'sin(v'-XO-ti^b'sîn(p.'-xO)-|- 

 +(vc'cos(v'— XO— wb'cosdx'— X'))tang<kr— Äl+X')=-^„k2a'. 



Da disse Ligiiîng-er skulle finde Sted for enhver Vær- 

 die af t, maa man have: 



^^ ^^^ — ^) — '^^^ cos ([A — x) = o, 

 ^ ^ vc'cos (^'— X') — îi;b'cos (jx'— >^0 == o» 



Sætter man nu: 



(427) 'I'-'^W (-»28) 



og; siibslllacrer de nye Störrciser p, q, p', q' for a, b, a', 

 ]>', saa fiader man af Ligningerne (422) og' (426): 



