| RefNo | HD/6/8/7/12/17 |
| Previous numbers | 93HD.9.6.17 |
| Level | Item |
| Title | Postcard from Lord Rayleigh to Dale |
| Date | 24 April 1942 |
| Description | Quoting a passage from p 49 of Newton's 'Opticks' describing his work on prisms |
| Extent | 1p |
| Format | Manuscript |
| AccessStatus | Open |
| AccessConditions | OPEN - but with some restrictions |