Project ID: 543
| Description | To measure the radius of the earth by the Eratosthenes method |
| Topics | Science |
| Type | U3A-led research (not an SLP) |
| U3A | Perth U3A Swindon U3A |
| Year started | 1999 |
| Source of reference | Reported at Science Summer School 2016 |
| Notes | This was a collaboration between two U3As as far apart as possible north to south in order to demonstrate the process |