Primitiae gnomonicae catoptricae, hoc est, Horologiographiae nauae specularis ... (1635)
Kircher, Athanasius, 1602-1680 · Auenione : Ex typographia I. Piot ... · leaf 215
LIBRI II. * • - hi … itaque inftrumento reflexorio eo fitu,vt centrum ia- ftrumenti centro fpeculi perfede , & femicirculus mobilis Q_A S. xquatori reflexo prxeise refpondeat, juxta methodum probi. 11. traditam & ex figura hic apparet. Inueftigabis primo ex tabulis arcuum di- urnorum , vel ex analemmatc ibidem pofito ,…
Sundials
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Epytoma Ioa[n]nis de Mo[n]te Regio in Almagestu[m] Ptolomei](https://img.insideoutlibrary.com/img/200/ia-EpytomaIoannisd00Regi-174-0.webp)
