![Set of 27 tubes for spectrum analysis](https://coimages.sciencemuseumgroup.org.uk/441/620/large_thumbnail_smg00072952.jpg)
Set of 27 tubes for spectrum analysis
1850-1900
3 sets of tubes for spectrum analysis and one coloured slide (in case) showing various absorption spectra in gelatine, all by John Browning, London, England, 1850-1900
1850-1900
1850-1900
1850-1900
1850-1900
1850-1900
1850-1900