Set of twelve tubes containing comparison sample solutions for use with a spectroscope

Set of twelve tubes containing comparison sample solutions for use with a spectroscope by John Browning, 111 Minories and 65 Strand, London, England, two tubes dated 1871, in case leather covered case (Wellcome B1473) Contents marked as 1) silver... (?) 2) Cautheride in ether (?) 3) Oxylates of chromium and soda 4) citric acid 5) Purple Wood 6) Magenta Rose analin 7) Magenta [July 10, 1871] 8) Chlorophyl in oil 9) Analin purple 1871 10) Oxydised Haematite July 1871 11) Cochineal and alum July 1871 12) unlabelled pale orange liquid