Nelson Monument

History of the Nelson Monument time ball

1. 1772
2. 1809  The world famous clockmaking firm Messrs
3. 1818  The observatory on the Calton Hill opens officially.
4. 1829 Portsmouth experimental time ball set up. Drawing of Portsmouthexperimental time.
5. 1833  Time ball set up at Greenwich Observatory. The East India Company decides to set up time balls along its trade routes.
6. 1840
7. 1846
8. 1853   Time ball set up on the Nelson Monument, Edinburgh. Ritchies design and supply the electric clock.