| RefNo | FS/7/2/290 | 
| Previous numbers | FS/14/2/26, Box 5 | 
| Level | File | 
| Title | Correspondence with Prof Harold Jeffreys | 
| Date | 1952 | 
| Description | On Kuhn and Rittman's work on the interior of the earth and on the melting curve of iron at high temperatures | 
| Extent | 5 letters | 
| Format | Manuscript and typescript documents | 
| AccessStatus | Open |