| Reference number | MC/21/494 |
| Alternative reference number | MC.06494 |
| Level | Item |
| Title | Letter from E P Perman, University College, Cardiff, to the Royal Society |
| Date | 20 June 1906 |
| Description | Perman would like to state in a few words the accuracy of their temperature measurements, and therefore requests the return of the proofs of the paper on [some physical constants of ammonia]. |
| Extent | 1p |
| Format | Manuscript |
| Physical description | Ink on paper |
| Access status | Open |