| Reference number | LBO/6/66 |
| Alternative reference number | LBO/6/164 |
| Level | File |
| Title | Copy letter from Henry Oldenburg to Christian Huygens |
| Date | 23 June 1673 |
| Description | ' Concerning his new book of pendulum - watches, and the principle on which is grounded the Lord Brounckers demonstration of the Cycloid etc. ' |
| Language | French |
| Extent | 4p |
| Format | Manuscript |
| Access status | Open |