Gemmae Phrysii medici ac mathematici, de principiis astronomiae [&] cosmographiae, dʹeq[ue] vsu globi ab eodem editi. Item de orbis diuisione, [&] insulis, rebʹusq[ue] nuper inuentis. : Opus nunc demum ab ipso auctore multis in locis auctum, ac sublatis omnibus erratis integritati restitutum
Gemma Frisius's 1553 Antwerp treatise on astronomy, cosmography and the use of the globe, printed by Johannes Steelsius for scholars and students of mathematics and geography. Its two pictures are a woodcut of a graduated astronomical quadrant with radiating lines and numbered arcs, and a printed coat of arms with a chevron on a shield and a motto scroll, which a designer could take as a model for dense instrument diagrams and heraldic emblem layouts.
![Picture 1 of 2 from Gemmae Phrysii medici ac mathematici, de principiis astronomiae [&] cosmographiae, dʹeq[ue] vsu globi ab eodem editi. Item de orbis diuisione, [&] insulis, rebʹusq[ue] nuper inuentis. : Opus nunc demum ab ipso auctore multis in locis auctum, ac sublatis omnibus erratis integritati restitutum (1553), leaf 2](https://img.insideoutlibrary.com/img/200/ia-gemmaephrysiimed00gemm-2-0.webp)
![Picture 2 of 2 from Gemmae Phrysii medici ac mathematici, de principiis astronomiae [&] cosmographiae, dʹeq[ue] vsu globi ab eodem editi. Item de orbis diuisione, [&] insulis, rebʹusq[ue] nuper inuentis. : Opus nunc demum ab ipso auctore multis in locis auctum, ac sublatis omnibus erratis integritati restitutum (1553), leaf 98](https://img.insideoutlibrary.com/img/200/ia-gemmaephrysiimed00gemm-98-0.webp)