92 



26 



Corollaiiiim 1. 

 Tab. II. 5. i3. Pio determinando tractu curvae valent eae- 



V'tCT S 



°" ' dem fere notationes ac supra §. 3. Liquet praeterea hanc 

 CLirvam habere cuspidem in puncto R. 



Corollarium 2. 

 §. 14. Acqiiationes exhibentes valores ipsarum x et 

 y, ope anguli ciuvedinis , sont sequentes : y =1 —-^ et 



:c — Ll°£_f^ _ 1 r^tffL^ — 1 (cot. (p. cosec. Cp -- L cot. i Cp). 



Th e or em a 1 . 



§. i5. Punctls V et P jwictis, si normalis YP produ- 

 Tab. IL catur u^r/uc ad intersectionem Q. mm recta T Q. 



^^' ^* ducta parallela rectae VP: intervallum PQ. aeqao- 



tur radio oscuU. 



Demonstratio: 

 Ob Dr- ^-^"^"^' et pz=-^-^ erit V~i-^pp--=l^ 

 et dp^ -ij^i- hincque Radius =: 4-^^*. At 



cum s\ty — XX, 6.— VY et V yy — hbz=z\X, liabe- 

 mus hanc propoitioncni : 



