| Reference number | NLB/54/612 |
| Alternative reference number | NLB/54 p345 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Messrs John Needham & Sons; 44 Brown Street, Manchester |
| Date | 4 July 1917 |
| Description | 'Replying to your letter of July 3rd, Magnesium is not used in any of its forms by the Royal Society.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |