In 8° (mm 105x155). leaves (20) with 10 woodcuts vignettes. Vellum with old material. First edition of this very rare book intended for practical construction and use of the quadrant, instrument used for terrestrial and celestial measurements. Johannes Dryander (Eichman), was born in Wetterau (Hessen) at the end of the XV century,: he studied matematics in Germany and medicin in Paris. Died in 1560 in Marburg an der Lan. Good copy with minor defects. Adams, D-942.