PUNCTVM TOSITIONE DATUM &.. 39 



Hinc fi BCzz^-^^^-^^i^^zno , Jd ell n:::.'^:,, , fiet 

 EHrzsziy^ , adeoqne ni-^^^-^—i^uz , luquc 

 adeo rubtungcns Piunboliic dnplo ubfciirac , ut fieri 



oportct. 



V. Sit gcneriilius acquatio ad fcifliones 



conicas X'' — ^ •'^' -^" "^" ^ ^' '^' "^ ' ' ^^'^^^ mutabitur 

 in ~\-inmzz:zi—zagnz-\-aag., 

 —gtm -\-2hn —zab 



furrogatis in ca fnz ettiz-a, y ct .v. Ex ilU vero 

 eliciuntur 



17 r' — af,y\.-hn. _ i _-^//agn -fet [ 2 aof-t-: afoi"\ 



gnn-mm gnri-mnil /gnn-mm -^ 



ER_i_«il:^_yf£«-_^>_aa£-+-:a^Y £j.g(j 

 ' /^nn-m/n ^jni\,-mm,\ l^nn^mvx ■' " 



EC-|-EBirH£r=l-" 



' gnn-mm_ 



FC— EB " V'( °g-<'t |2_ aagH-:ofc-i \ 



EC EB— ^^-— . 



*-'^* L-^i-» — /^nn-mm 



Hinc fiEC-EB=:o, fiet /?— 5!±±Wii^^iiHZi3*), adeo- 

 que EH(— -^=?^-):^^;|?L_. Ex hisce jam paflim 

 ootas proprictatcs Diametrorum in Sedionibus Co- 

 nicis et nuilta alia facili ncgotio deduci poflTciu, fcd 

 nolo in lebusjam fatis cognitis atque ufu tricis pro- 

 lexior cfTe. 



'VI. Si aequatio curvae AHD fit j''=r/'.v>'— .r', pig. 2, 

 invenietur proptcr y—mz et x—tiz—a , aequatio 

 —m'^ z^—-n'^ z'^ -\-:iantizz- :iaatiz-\-a'^ , quac reje- 

 <flis omnibus ad candcm aequationis partem abit 

 in -\-tn'^ z^ -^^atmzz-^-^iaanz-a^^zzLOi 

 — «' — bmn -{-abtn 



cu- 



