| Reference number | NLB/15/197 |
| Alternative reference number | NLB/15 p113 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Edwin Humphrey, 'The Chemical News', 6-7 Creed Lane, Ludgate Hill, E.C. |
| Date | 14 July 1897 |
| Description | With reference to Humphrey's letter of the 12th, Harrison regrets that he cannot help Humphrey directly in the matter of the paper by Sir William and Lady Huggins, 'On the Relative Behaviour of the H and K Lines in the Spectrum of Calcium' as the illustration is a collotype plate and not a woodcut. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |