| Reference number | NLB/61/608 |
| Alternative reference number | NLB/61 p350 |
| Level | Item |
| Title | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Editor of 'Engineering'; 35 Bedford Street, Strand, W.C.2. |
| Date | 20 September 1921 |
| Description | Informs the Editor that there will be no objection to his reproducing the figures illustrating the paper by Dr. W. L. Balls in 'Proceedings A', Vol. 99, provided he obtains permission from the author. |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |