| Reference number | NLB/71/701 |
| Alternative reference number | NLB/71 p359 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. Young, FRS, Switzerland |
| Date | 8 October 1928 |
| Description | Informs that an engraving of a photograph will never be as good as a reproduction of one. Explains the portrait sent in is actually a photogravure, not a photograph. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |