Der dreyfach geartete Sehe-Strahl, in einer kurtzen doch deutlichen Anweisung zur Optica, oder Sehe-Kunst : bey übrigen und einsamen Stunden zu Erhebung Göttlicher Weissheit und den Kunst begierigen zur Handleitung, in etwas erwogen
A 1710 German treatise on optics by Johann Michael Conradi, published in Coburg and printed in Thurnau, written as a short accessible guide to vision and optical study for readers with leisure hours and an interest in the subject. The title page engraving is allegorical: a seated figure with a telescope and a nude male figure with a sphere and instruments beside a draped table of scientific apparatus. For a designer, it offers a baroque allegory of sight and science, with lens, scale, and instrument motifs that suit classical or scholarly themes.
