( ) 
tranfeat femper reda D P O mobilis circa quattunt 
polum D, qu£e fecet rectam A N S in P ; dein aga- 
tur per illud P reda E PQ_duda a polo quinto E, 6c 
producatur utrinque ut redis B Q^S ; C N O, occurrat 
in Q_ Sc W : dico punda Q, W, Lineas quarti ordi- 
nis defcribere. Demonftratur ex undecima ‘Prop. 
Exerc. Geom. Per polos A, E, B, D, agantur re- 
ds A EH, BDF, reds d K pofitione dats occurren- 
tes in H, F ; Jungantur D, E, atque per polos D, A, 
duda AD, reds, dYL occurrence in V ; ex illo V e- 
ducatur reda V B ad polum B qus redam D E fecet 
in G. Figura defcripta tranfibit per quinque punda 
B, E,G,F, H, tripliciter autem per polum B. Produ- 
catur per polos A, B, reda A B R qus reds K R po- 
fitione dats occurrat in R j Curva etiam tranfibit per 
punda R, K, 
Hinc elicitur methodus ducendi Lineam quarti or- 
dinis pernovem punda data quorum unum fit triplex. 
Dentur enimB,E,F,G,H,L,M,T,Q, 6c oportet unum 
B efTe triplex, Jungantur punda B F, F H, H E, pro- 
ducanturque 
