| Reference number | NLB/72/163 |
| Alternative reference number | NLB/72 p84 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to M. Pierre Abraham; rue Dufetel, Le Chesnay, France |
| Date | 1 May 1929 |
| Description | Replies to an enquiry about a portrait of Lord Kelvin inserted in Mach's Warmelehre (1923). Asks M. Pierre Abraham to send a photograph of the portrait, and then hopefully the Royal Society can identify it and trace the original. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |