Dioptra.

Draft by Heron.
Credits:
© Image, text: Slovar’ antichnosti. / Per. s nem. — M.: Progress, 1989 (to article “Dioptra”)
THE GALLERY OF ANCIENT ART
Keywords: dioptra the draft by Heron Hero of Alexandria Heron instrument for sight instrumentum at take a sight on goniometrical goniometer
HISTORY OF ANCIENT ROME