Guilielmi Blaeu Institutio astronomica de usu globorum & sphaerarum caelestium ac terrestrium: : duabus partibus adornata, una, secundum hypothesin Ptolemaei, per terram quiescentem. Altera, juxta mentem N. Copernici, per terram mobilem.
Willem Blaeu's 1652 Amsterdam treatise on globes and celestial and terrestrial spheres, printed by Johannes Blaeu for astronomers, navigators and instrument makers, presents Ptolemaic and Copernican systems in Latin. Its sundial plates show dial layouts with hour lines fanning from a central gnomon, with hatched shaded areas and lettered construction points, useful for designers working on radial geometric diagrams and scientific linework.
