Zone d'identification
Cote
Add. MS a/207/41
Titre
Letter from John Herschel
Date(s)
- [1 Jan. 1840] (Production)
Niveau de description
Pièce
Étendue matérielle et support
2 pp
Zone du contexte
Nom du producteur
Histoire archivistique
Source immédiate d'acquisition ou de transfert
Zone du contenu et de la structure
Portée et contenu
JH will be happy to see Mr. Bunt's [Thomas G. Bunt - based in Bristol and took most of WW's tide observations along the South-West coast] Planetarium. Could WW bring it to his new home in Hawkhurst, Kent? JH is getting no end of strange results from his photographic research: 'I have now got papers which when half darkened darken more at the red end of the spectrum and whiten at the violet - others which darken far beyond the visible end - others which darken at the first impression of the light and then whiten - some which whiten at the two ends of the spectrum and darken in the inside etc'.