Reference numberNLB/45/150
Alternative reference numberNLB/45 p92
TitleCopy letter from Robert William Frederick Harrison to Messrs Longmans, Green & Co
Date5 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.'
Access statusOpen
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