| Schickard's
"Calculating Clock" 1623 |
 |
| "Schickard and his
family did not survive the bubonic plague and his
detailed notes remained unknown until discovered in 1935
and 1956 by historian Franz Hammer. Mathematician Bruno
Von Freytag from the University of Tübingen used them to
reconstruct the machine in 1960. One unit is in the
Deutsches Museum in München." James Redin |
| Source:
Picture taken by Eusebio Huélamo, Spain. |