On urobilin / by Archibald E. Garrod and F. Gowland Hopkins.

  • Archibald Garrod
Date:
[1896]
Catalogue details

Licence: Public Domain Mark

Credit: On urobilin / by Archibald E. Garrod and F. Gowland Hopkins. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    PLATE I. A. Shows the effect of dilution upon the spectrum of urobilin in acidified alcoholic solutions. Fig. 1. The specimen had a browu-orange colour. 2. Diluted to 4 volumes (yellow). 3. Diluted to 8 volumes (pale yellow). 4. Diluted to 16 volumes (dull pink). 5. Diluted to 32 volumes (very pale pink). 6. Diluted to 64 volumes (hardly appreciably tinted). B. Fig. 1. The e band spectrum, as yielded by the slightly turbid liquid having in suspension the precipitate formed by the acidification of a con- centrated, alkaline, aqueous solution of urobilin. 2. Spectrum of urobilin in acid alcoholic solution. 3. Spectrum of modified urobilin in acid alcoholic solution. 4. Spectrum of urobilin in an alcoholic solution of sodium hydrate. 5. Spectrum of urobilin with zinc chloride and ammonia. 6. Spectrum of mercury-urobilin. [The expenses of this investigation were amongst those covered by grants from the Government Grants Committee of the Royal Society.]