M0016624: Illustration of the spectroscope used by Lockyer in his discovery of helium in the sun's atmosphere, 1868
- Date:
- 1958
- Reference:
- WT/D/1/20/1/149/73
Licence: Public Domain Mark
Credit: M0016624: Illustration of the spectroscope used by Lockyer in his discovery of helium in the sun's atmosphere, 1868. Source: Wellcome Collection.
