Title: Monochordvm mvndi symphoniacvm, seu, Replicatio Roberti Flvd, alias de Fluctibus ad apologiam Ioannis Kepleri aduersus demonstrationem suam analyticam, nuperrime editam
Subtitle: in qua Robertvs Validoribvs Ioannis obiectionibus, harmoniæ suae legi repugnantibus, comiter respondere aggreditur
Subjects: Harmony of the spheres, Mathematics, History
People: Johannes Kepler (1571-1630)