| Reference number | NLB/71/522 |
| Alternative reference number | NLB/71 p265 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Messrs. E. Arnold and Co., 41 Maddox Street, W1 |
| Date | 18 June 1928 |
| Description | Informs E. Arnold and Co that [John Norman] Collie has no objections to them reproducing the diagram found in his article ['The homogeneity of helium and of argon'] for the book [The discovery of the rare gases] by [Morris William] Travers. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |
| Related material | doi.org/10.1098/rspl.1896.0040 |
| Related records in the catalogue | NLB/71/512 |
| NLB/71/523 |