| Reference number | NLB/63/897 |
| Alternative reference number | NLB/63 p512 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to F. Simeon Esq. |
| Date | 19 January 1923 |
| Description | Letter regarding the reading of Mr. Simeon's paper on "The carbon arc spectrum in the extreme ultra violet" |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |