A torquetum: a medieval astronomical analogue computer, designed to take and convert measurements made in three sets of coordinates: Horizon, equatorial, and ecliptic. #history #astronomy #mathematics
Medium scale 3.
Orologio solare | Flickr - Photo Sharing!
bosco chiesanuova | Flickr - Photo Sharing!
....camminando | Flickr - Photo Sharing!
polyhedral sundial (detail from Hans Holbein's Ambassadors.)
sundial detail Eyam? , Derbyshire
Pocket sundial, Saxon, 10th century. original dial, of which this is a copy, was found in 1939 in the soil of the Cloister Garth at Canterbury Cathedral in Kent.
Rocca Canavese - Fr. Remondato, #TuscanyAgriturismoGiratola
Le sphere de monde by Oronce Fine, 1549 m by peacay, via Flickr
JULIEN LE ROY'S IMPROVED HORIZONTAL SUNDIAL, French, c. 1740, signed "Jacques Le Maire de La Societe des Arts, au Genie a Paris."
Zegar słoneczny // fot. A. Czechowski
Astrolabe gilt brass. DATING 1540-1570