ZAHN, R.P.F. J. Oculus artificialis teledioptricus sive Telescopium... Fundamento Physico seu Naturali... Wurzburg: Quirinus Heyl, 1685. Volume I (of 3) only. Engraved title, engraved portrait frontispiece, and numerous engravings in text. Folio, contemporary limp vellum, spine with old vellum repair, browning and staining throughout, some other light wear. FIRST EDITION. Norman 2278.