[ 3 9« ] 
JrcHs vera competcfjsp isgr. '^m. ^()S, Hujus Sims Verfi 
Log. 8.5362376^ additus Log.Radii 2.3095913. ^4^0.8457- 
889. ciijus tert 'iA pars 0.2819276. efi Log. Radicis Cuhtcd^ 
1.91 394, cjimdivifore divifo -5- five d, fit Qmtus 7.37281; 
Quoti ac diviforis fumma^ auSta additione jb, jit Radix ^:u^ 
fit a J nempe 14.9534, ^c. 
Exa^tis Cuhicis Bicj^uadraticas jam aggrediamur \ Ha fem^ 
per velmllam^vel dmsy vel quatuor Radices veras haloent^ qua- 
mm determinatio partim a Coefficientihus, partim a fiigno & 
magnitudine nimeri ahfoluti dati^ pendet ; Harum omnium 
Conftrul^ionem generalem (i^N^^ 18 8. Pag. 341^ fat is con^ 
cinnam prodidi^ quam Le5torjam vidijfe lupponitur ; Figuram 
tamen eo fpeStantem ("Fig. W,) hue transferre vifum ejl. In Ccn^ 
fiructione aquationis tJ" — hi? -fpzz--qz-|-r :==;o, ft 
BD |b,A B = i-^b b ,B K =:= i?/^^ dimidio Later is recti, 
KC=2 AB=:ibb. KE=:ibb — ip, AE-i==:/,bb~ip 
■pE-=z,\h' —%h^y 4^EG=j^' —\h^-\'i(\;qmfaao 
Circulus centra G,Radio V G D"" interfecahit Paraholam 
vel nulloj duohus aut quatuor punStis^ qua perpendiculis in line^ 
amDHy Radices omnes z exhihent. Vt aut em quatuor fint^ 
evidens ejl centrum circuit alicuhi confiitui dehere intra jpati* 
nmj de cujus pun6to quovis tria perpendicula in Curvam Para" 
hoU den^ti pofJtnt\ atq\fimul radium minor em ejfe maxima ex 
illis perpendicular thus y major em vera medio. Quod fi centrum 
confiituatur extra hoc fpatiumy ut nan nifi una perpendicularis 
in Paraholam demittipofjit^qua major fit radius\ vel fi minor fit 
media ex tribus perpend, major vera quam minima ex iUis^ dua 
tantumpoffunt effe radices ; nulla vera omnino datur^ quoties 
radius V G 0* — r minor efi minima ex trihus^ vel una ilia, 
quoties una tmtum efi. 
Jam quale fpatium hoc fitj quihufq\ limitihus difcernitur^ 
ac quihus conditionihus radius Circuli minor vel major fitt pra^ 
di6tis perpendicularihusj nobis reft at inquirendum ; ac primum 
quo paBo perpendiculms in Paraholam demitti fojjit oftenden^ 
drnneft. 
Sit A 
