F. Marini Mersenni ... Cogitata physico mathematica : in quibus tam naturae quàm artis effectus admirandi certissimis demonstrationibus explicantur (1644)
G ,& intermedijad focum C, hoc eft fere ad quar- tam axis fphzrz partem. Omitto pluresalios vítio* nis modos ,quos le&or ex didis, aut dicendisintelli- £SC7 ANSA gere poterit. IM V ndecima proprietas in co fita eft, quód:linez- omnes à quolibet: pun&o concauz paraboles reflexz ad focum fint zquales… … tria finr ex vna parte, & vnicum.ex alia, omnes. ordinatae ex punüis finiftra partis. ducta-fimul fumptz funt xquales.ordinaris dextrae partis fimul fam. ptis ,adeout fi vnicum ex altera parte reperiatur punctum, ac confe-.- quenter vnica ordinata, fit tamen z:qualis tribus ordinatis in alia par.…
Science -- Early works to 1800 · Navigation -- Early works to 1800 · Music theory -- History -- 16th-17th centuries
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
![An illustration from Philippi Lansbergii Triangvlorvm geometriae libri qvatvor : in quibus novâ & perspicuâ methodo, & apodeixei [romanized], tota ipsorum triangulorum doctrina explicatur .. (1631)](https://img.insideoutlibrary.com/img/200/ia-philippilansberg00lans_1-150-0.webp)
