34 A NEW METHOD OF DETERMINING 
Then 
8(¢,+¢5) =A” + A’ 
8(¢4—«¢;) =A-+ A” 
8 (¢; + 3) = BY’ + B’ 
8 (c¢;— ¢3) = [A— A” + B+ B’] cos 45° 
8(¢,+¢.)=B”—B 
8(G— en) = [4— A” — (B+ B’) | cos 45° 
8(¢,+¢)= A” —A’ 
8(¢,—G® ) = B—B’ 
8 (s, + 55) = C+ C” 
8 (s:— 55) = CO" + 
8 (83 + $3) = | D + Di —(C— Cc”) | cos 45° 
8 (s3 — 83) = D’ + D” 
8(s;+ $1) = [D+ D” + C—C"] cos 45° 
8(6¢,— sn) = Di — Dp” 
8(s; +s) = D—D’ 
8(s,—s )=—CO'"+ C.. 
The expressions for the determination of the values of c, and s,, just given, are 
found in HansEn’s Auseinandersetzung, Band I, Seite 159-164. 
