| RefNo | MS/603/4/41 | 
| Previous numbers | 629 | 
| Level | Item | 
| Title | Letter from J [James] William Gifford, Oaklands, Chard, to [Joseph] Larmor | 
| Creator | Gifford; James William (1856-1930); British lace manufacturer and optical physicist | 
| Recipient | Larmor; Sir Joseph (1857-1942); Irish theoretical physicist | 
| Date | 18 October 1906 | 
| Description | He has an unexpected confirmation of the accuracy of his refractive indices of water, given in the small table. He refers Larmor to eight measurements by different observers given in Dufet's [Recueil de] Donnees Numeriques, and he transcribes and discusses these. He thanks Larmor for a letter of 13 October, saying that he is quite ready to adopt Larmor's suggestions, if in spite of this letter he is unable to concede Gifford's accuracy. | 
| Extent | 4p. | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open |