' ( 96i ) 



/ ^N _ (xg, +y^+zgg' (xg + y.i + z^) _ (xg+y,)+zi;)e' (xg^ + yw,+ zi:,) 



\.^9) ^ ' '' r ' 



(3o) V = iiS, -h ^>y^ + w(^, ^, "?/ + ^'n, + w, ; 



et, comme on aura encore, 



X = Dr, y DiJ, z = B^t, 



on tirera des formules (19), (20), (21), (22), jointes aux quations (28), 

 (29) > (3o)> 



(3i) 

 (32) 



^ = (G - I)? + D (|D + >3D. 4- CD,.) (H - K) 



+ (J'i, + Du (,D + vj.D, + <;,D.) , etc. . . ; 



+ g,| + D(?D + -/D., + D)S etc. . .; 



%= .^ D ^J^:^^M' + Dr.(?D+ ,D. + D) ^^^-f + ^-'^- 



(33) l + a?.D^^l^^-=|^l^+D^,aD+,D.+ ,DJ ^- -^"-"f '^+^-^ 

 - ^'^S{[m/(r) + /,f(r)]x^}-|s {Ky:(r) + /wf(r)]x=}, etc.; 



:(, D + Djfcl|lM^+D.DJ^D+.D.4-D,jfc:b5 



(34) ( +(..D.+ A.) ^-(^--^-^+^V D.D..,(gD+.D.,+D.)^^iM=^ 

 .|;S{[m/(r)+m,f(r)] yz} - | S {[mj;{,) + m,f'(r)] yz} , etc., 



les valeurs des quantits 



G, H, g, , I, K, 5, ac, 



tant 



^^^) ^ r f'(^) 1 



