i;54. SOLFTIO CKNERALIS 



H-op^^ + oy^-Hoo"- Eft vero o^''-oL'':=znob''^^ 

 q.bg,^ oy^^-^oc^ — noc^-' {-dq.b^- {q-{~ dq)cy ) 

 €t.o§."--od''—nod''~^ i-d.q.b^-i-idq-\-ddq) cy 

 •^{q-\r^dq-\~ddq)d3).. Fit igitur b^{ob''-^ .q— 

 oc^'-. dq-od"-'. dq)-cy\ oc""-' .{q-\-dq ^-od"—' 

 {dq-\-ddq)-\-dS {od'^' ( q-\-2dq-\-ddq) = o.Et 

 genenitim fi afllimta fuiflet haec formula J.Tdx fignifi- 

 cetque T fundionem quamcunque ipfius j-, ita. \t fit 

 TzzL^j, prodituni fiiiflet flequatio ilk b(i{Lq—{z 

 t-h-2.dL-\-ddL)dq)-cyiLq-^qdL-dLdq-L 

 ddq~2dLddq-dqddL-ddLddq}-\-d$ {L-\-2d 

 L-\-ddL)iq-\~2dq-\-ddq)i:io. H;ie \ero aequa- 

 tibnes nuUo modo ad talem f(")rmam b^.V — cy(?-\- 

 d? ).-\- d${?-\-2.dP-\- dd? )=:zo reduci poffiint. , 

 Qiiamobrem eae aliter adhiberi non poterunt, nifi \t 

 cum duabus refiqnis aequationibus , quas alterae condi- 

 tiones fuppeditant, coniungatur, et re ipfi elcmenta Z^p, 

 cy,ttd§^ ehminentur. Habeant autem rehquac duae 

 aequationes talem formam , et fuit b^- p — cy(p-\- dp) 

 -\-d§(p-\- 2.dp-\- ddp):=o et b(i. r—cy {r-\-dr) 

 -^dS{r-\- 2dr-\-ddr)z=io. Illa vero aequatio fit 

 breuitatis gratia b^.A—y.B-\-d§.Czzo.. Ex fiis fi 

 ehminentur ^p, cycfdS prodibit ifta aequatio A{p 

 dr—rdp-\-pddr—rddp -f- dp ddr — drddp ) — B ( 2 j) 

 dr— 2 r dp-\^pddr—rddp )-\-C{p dr—rdp ):==<', vel 

 fi ponatur rzz:pt haec A{ppdt-\-ppddt-\-2pdpdt-\-pdpddt 

 -pdiddp -h 2 r// dt j-B ( ^pp dt-\-pp ddt-\-2pdpdt) 

 -\-Cppdt=o. Qiiae determinabit naturam curuae 

 qmefitae. Poterunt antem loco acquationis ^p. A-c-y . 

 ]B-H<^^»Czr(?, omiies aequationes, quae ex quibus- 



cunquej 



