| Reference number | NLB/55/541 |
| Alternative reference number | NLB/55 p294 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to The Director, National Physical Laboratory |
| Date | 24 May 1918 |
| Description | Letter informing that Dr. E.F. Armstrong was appointed to serve on the General Board of the National Physical Laboratory until March 31 1921 in place of the late Mr. N.H. Martin |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |