| RefNo | MS/525/7/2 |
| Level | File |
| Title | De Lange-Joly correspondence with the Royal Society War Committee: Engineering Sub-Committee |
| Date | February-June 1915 |
| Description | Letters from Dr De Lange and Baron De Linden on Thermophone; and Professor John Joly on mine and submarine warfare. |
| Extent | 29 items |
| Format | Manuscript and typescript documents |
| AccessStatus | Open |