| RefNo | MS/603/4/51 | 
| Previous numbers | 639 | 
| Level | Item | 
| Title | Letter from David Gill, 34 De Vere Gardens, Kensington, London, to [Joseph] Larmor | 
| Creator | Gill; Sir David (1843-1914); British astronomer | 
| Recipient | Larmor; Sir Joseph (1857-1942); Irish theoretical physicist | 
| Date | 25 May 1912 | 
| Description | Gill thinks that Larmor underestimates the value of [James William] Gifford's 'Means of figures' and he asks that it might be sent to [Richard Tetley] Glazebrook. It is not necessary to give the composition of the glass, as this was well known; but variations in optical properties of glasses which are supposed to be identical is less well known, even variations from the same melting. These are worked out by Gifford and Glazebrook would be a 'very good practical referee'. | 
| Extent | 2p. | 
| Format | Manuscript | 
| PhysicalDescription | Ink on paper | 
| AccessStatus | Open |