| Reference number | NLB/33/44 |
| Alternative reference number | NLB/33 p27 |
| Level | Item |
| Title | Copy letter from Robert William Frederick Harrison, to Professor Frank Watson Dyson, Fellow of the Royal Society |
| Date | 19 June 1906 |
| Description | With further reference to the reproduction of Dyson's spectrum, asks if Dyson has any preference for half-tone or collotype reproduction. Offers Mr Wesley's opinion on the advantages and disadvantages of each method. On Wesley's recommendation the Society has contacted Dent & Company of Clapham who think the half-tone process with very fine screen would be quite suitable. Asks if Dyson wishes for all the blemishes in his negative removed as far as possible, or whether his intention was that the plate should be a facsimile, apart from strengthening the faint lines. |
| Extent | 1p |
| Format | Carbon |
| Physical description | Typescript |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA8209 | Dyson; Sir; Frank Watson (1868 - 1939); astronomer | 1868 - 1939 |