| Reference number | NLB/58/332 |
| Alternative reference number | NLB/58 p178 |
| Level | Item |
| Title | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Messrs Ross Ltd.; 13 Great Castle Street, W.l. |
| Date | 21 April 1920 |
| Description | Informs Messrs Ross Ltd. that the Society has an upright arc-lamp automatic feed lantern at their disposal and asks if they would like to make an offer on it. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |