CALVISIUS, SETHUS. - THE ASTRONOMICAL SYSTEM OF CALVISIUS.

Opus Chronologicum : Ex autoritate potissimum Sacrae Scripturae & Historicorum Fide Dignissimorum ; Ad motum Luminarium coelestium, tempora & annos distinguentium ... & deductum usque ad nostra tempora. Cui praemißa est Isagoge Chronologica, In qua Cum Tempus Astronomicum ... Luminarium coelestium, & eorundem Eclipsibus; tum diversae diversorum in omnibus Epochis annorum quantitates & formae dilucide explicantur ... Editio Tertia Multis in locis emendata, & ad praesentem 1629. usque annum continuata./ Studio & opera Sethi Calvisi[i]

Franckfurt, Thumius, 1629. 4to. Contemp. full, richly blindtooled pigskin over wood. Raised bands. Ms title on spine. Engraved pictorial titlepage, engraved portrait. Printed titlepage in red/black. (10),242,1294,(84) pp. A faint dampstain to some right margins of some leaves in the Index. Internally fine.

Calvisius was a significant astronomer, apart from beeing a noted composer and musical theorist. In this, his "Opus Chronologicum" he set forth his own astronomical system which he based on the records of nearly 300 historical eclipses cited and expounded here in their historical context.
"Les rapprochements entre les phénoménes célestes et les événements de l'histoire sont établis avec beaucoup d'érudition." (Houzeau & Lancaster No 12831). - Zinner, 4029 (the first edition of 1605).

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