| Reference number | NLB/45/150 |
| Alternative reference number | NLB/45 p92 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison to Messrs Longmans, Green & Co |
| Date | 5 January 1912 |
| Description | 'I am unable to identify 3 figures from the list of blocks which Sir Wm Abney wishes to see use in his book on Trichnomatic Vision. The following is a transcript of the information respecting them given on the list.
1. Diagram of the modified apparatus III ! 1892 Fig 1. Diagram of the colour patch apparatus.
2. also a small cut bellow [handwritten diagram].
3. Transactions: [?] of eye to light a colour (1897) fig 8 p 303.' |
| Extent | 1p |
| Format | Carbon |
| Access status | Open |