•

,© =58 58 —%'%" = A D,

= 2t 58

— 58' 58"

— B D,

(26)

)©' =58'58' — 2t"2t — AD,

9 >'

= 2t' 58' ■

-58"58

= BD,

( ©" = 58" 58"—2t 2t' = A'D,

9 )"

= 2t"58"

— 58 58'

— B"D,

et, quoniam

leuis calculus suppeditat

(27)

©

9)"e+£)'(r+9> <r

©

3 >

3 >

$P' 6 + 93 S' + ©"6"_

© 5

porro esse debebit

(28)

© = — A Dg — B"Dg' — B' Dg”,

©' = — B"Dg — A , Dg—B Dg”,

©" = — B' Dg — B Dg' — A"Dij r ,

0v =&-{AD + %)gg - (A'D + %')gg’- (. A'D + W)g"g "

- 2(BD + Sß)g'g" - 2 (B D + &)g"g - 2(Z?"/> + 58")<, /

— oQg— 2sy—o<ry\

11 .

Ilaud difficile est conclusu ex iis, quae artt. 9, 10 exposila sunt, aequa-tioncm (24) per transformationein primam adiumento formularum (14) earundem,ijuae inseruiunt ad Iransformalionem primam aequationis (2), transire in

(29)

/2t, 2t"\

V58, 58', SB"/

Ii'

variabilium x\ y, z, determinantis £), et in qua constans Ii ', eadem, quaein aequatione (l5) obuia est, valorem induit in (16) exbibitum. Perinde aequa-tionem (25) per transformationem primam earundem auxilio efliciendam formula-rum (14) manifestum est transire in