Sphaera mundi, seu, Cosmographia demonstratiua, ac facili methodo tradita : in qua totius mundi fabrica, vna cum nouis, Tychonis, Kepleri, Galilaei, aliorumq́; astronomorum adinuentis continentur : accessere I. Breuis introductio ad geographiam. II. Apparatus ad mathematicarum studium. III. Echometria, idest geometrica tractatio de echo. IV. Nouum instrumentum ad horologia describenda : opus posthumum : correcta à multis mendis, quibus scatebat (1653)
ua omnia effent eodem modo demonflranda , quo demónftrantur in tra&ta- tu de figura Iridis. Sed hac forie nimis breuiter . ha veh. Edom ficundariam manififlare ..— T heorema X111. "a S Int exempli gratia, duo refle&entia C S. A B.ab inuicem diflantia faltem 25. paffus Geome:ricos , inui- cemq; non… … tribus lineis S I. I C. C A. diflantia autem per quam recurrit Echo ad ipfum fonorum conftat cantum dua- bus S B. B S. vnde patet propofium . eodem modo Echum terciariam in ratione dupla » &c. fimiles faci- lé demonpfirabimps. el Uu a ru 202 Gale (
Mathematical geography · Echo
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
![An illustration from Les mechaniqves de Galilée ... : avec plvsievrs additions rares, & nouuelles, vtiles aux architectes, ingenieurs, fonteniers, philosophes, & artisans / traduites de l'italien par L.P. M[arin] M[ersenne] (1634)](https://img.insideoutlibrary.com/img/200/ia-lesmechaniqvesde00gali-32-0.webp)
