fi4f S O L V T I O 



i8. En ergo fub vno confpedu quadrata fex 

 horum interuallonim i 



II. EG^:z:~fA-pp-F3?-f 



III. ^W-^^-pp-\^^q 



IV. YQ^iz-ipp^lq-'-f 



r r r 



VL GH— .,,, ^ 



Tak n. Ybi cuidcns, eft, effe EH" |EF etFHir|EF, fic- 

 ^*S* J^* que pundum H per punda E,,F fponte determina- 

 tur , fcilicet fi tria pun(fla E,, F, G forment trian- 

 gulum E F G tum quartum punflum H ita in re- 

 ^a EF produda erit fitum vt fit FH=:iEF 

 jdeoque EHrr:|£F. Hinc vero deducitur 4GH* 

 -l-aEG*:=:3EF'-|-<JFG', quod. cum valoribus in- 

 ventis apprime congruit. 



ip^. Quo nunc has fbrmulas ad maiorem fim- 

 plicitatem reuocemus , ponamus ^pq—p^—^rzz^s 

 vt fit 4AAr:/>j: et 49— /jpH-y H- ^' i tum ve- 

 ro faciamus : 



,. _^ = R,^r=(^et;)^-P 

 ita vt P„ Q^,, R fint quantitates duas dimenfiones in- 

 voluentes. Qiioniam igitur hinc eft /^ n x ^^i^ 

 p^y?'„ ?=iPHt-2Q-h^» et t=.qy?, at- 



que. 



