| Reference number | NLB/65/724 |
| Alternative reference number | NLB/65 p400 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to M. D. Hart, Esq. |
| Date | 13 December 1923 |
| Description | Suggests for M. D. Hart's paper that a new block be put underneath an existing block to improve the diagram for readers. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |