.M^rn M' t'A.'a^'^ ,~.-6 PI 1 r'^'J ^^ 



i- 



\,. 



Fvtj.i 



E. je— eue. cc^jilsc. 



F. djc. 2dœ. 



G. .r. ^- 



Sd<c 



1 



f>. V- dv i- y- dy v-jdi'*tf~j dxf . V -jdv* y —jdy . . 



-v-v-f-y— y = 



dr -/- dy jdu 



l' t- y i' 



jdv —t— ^dll 



Ç . dv. jdv. jdr 



p. V —*— y-dy. V -h- u—jdy. v - -t— y — jdy. 



î*. v-dv-*-y—dy. v~idvty-^dy. x^-^dv + y-^dy... 



1» ->- 7/ — 14 = V. 



..rv — v-t-y~~ y= a . 



a 



Ri. U.V 



■f 



,dy. 



ty- 



V -jdi^* 



Vf- 



v—jdi'i-y 



Jdy.. 





.H A,.,.,™,,,^.. a.,, .'.uif 



