| Reference number | NLB/55/756 |
| Alternative reference number | NLB/55 p411 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to The Director of the National Physical Laboratory |
| Date | 04 September 1918 |
| Description | Letter forwarding a letter and form from the Patent Office |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |