VAEIATORVM. i6i 



In graultate Yniformi flt area EHIF re(!langiilum 

 j^^gs, fi OEdicatur/, OB vel OFr:3^,etFI=:EH=:^, 



fldeoque (^-V{2fg—2gz) , et dy {-^l^^^) - 



-ss, eritque 2^s=lii±^:g^-n«) exiftente fc^V, 



1 — rfs; —2sds . 2sds ^t. dy / —sdz \ —nssds , 



adeoque __-jj^-g-t-_, et i-i=~)=-j^_^^-\' 

 -^^--''-.^s-^-.^^^^rfAy/^-siB, pofitis dA-J':!i, 



ss~^\ ss-{-h ^j-f-i ' -i^ ss-^hl 



et ^B, =,-rn"» eruntque A et B anguli communem tan- 

 gcntem s habentcs, quorum radii funt Vh^ tti, Fra- 

 (flio vero % defignat angulum BG^ , adeoque BGZ^n 



zdAVb-^dB , etintegrando ang. BGOz=i2A"l//:?-2B 

 -l-A j vbi A ed quantitds conftans quae dete. minatur ex 

 fuppofitione anguli BGOzz^», quod contingit in pundo 

 O. Sit GOzz:^ , fietque hoc cafu z—e adeoque 

 ^^y/l^^^ig)^ dicantur anguli quorum communis tangens 

 eftir^-^^^ei; ^^ ^^^''^ ^""^ V/^ et i, G ct H , inuenietur 

 qGVIj—^K-^a-^z^o , adeoqueA=:2H-2Gy/7, iteiri atig. 

 BGO(=:2Al//^-2B-f-A)— -f-2Al//:;-2Gy/;-4-2H~oB, 

 quae hanc conftruclionem fuppeditnt. Abfcindantur in ^'^s- ^- 

 linea indefinita partes AC— V/;, et DCzzi , et inper- 

 pendiculari ad has capiantur BC=i:-^^^^-_ et CFzn ^ 

 v^-^^f^^K-j 5 duaisque ex A et D ad punda B et F ,. 

 lineis AB, AF et DB, DF, fiat angulus NAF qui fit 

 ad angulumBAF,vt Vb ad i, et in fig. 1 1. condituatur 

 Tom. II. X angu- 



N 



