Rafractiones coelestes, sive, Solis elliptici phaenomenon illvstratvm : in qvo variae atqve antiqvae astronomorvm circa hanc materiam difficultates enodantur, dubia multiplicia dissoluuntur, via ad multa recondita eruenda sternitur ...
A 1617 Latin astronomy treatise by Christoph Scheiner, printed at Ingolstadt, on astronomical refraction and the apparent elliptical shape of the sun near the horizon, written for scholars and fellow astronomers. Its single picture is a plain geometric diagram of concentric circles with lettered points, lines and a bold radial sketch, offering a designer a spare, hand-drawn schematic motif with a scientific, instructional feel.
