1859C.E., Frederick Field, On the Arseniates of Baryta, Lime, and Magnesia, and the Separation of Arsenic from other Elements., in The Quarterly journal of the Chemical Society of London, Hippolyte Bailliere; Volume XI, page #18:
This substance, which I will call paviin, when dissolved in water, yields, like æsculin, a highly fluorescent solution, and the fluorescence is in both cases destroyed (comparatively speaking) by acids, and restored by alkalies. The tint, however, of the fluorescent light is decidedly different from that given by pure æsculin, for a specimen of which I am indebted to the kindness of the Prince of Salm‐Horstmar, being a bluegreen in place of a sky‐blue. The fluorescent tint of an infusion of horse‐chestnut bark is intermediate between the two, but much nearer to æsculin than to paviin.
1882C.E., Edward Schwarz, The Forensic‐Chemical Determination of Gelsemine in Animal Liquids and Tissues., in The Pharmaceutical Journal and Transactions., J. & A. Churchill; volume XIII, page #149:
To the well‐known reaction of æsculin and æsculetin must be added their behaviour to Langly‐Koehler’s test, which is very similar to that of picrotoxin,* except that the colour with æsculin is deeper brown, and with æsculetin, red‐brown.
1908C.E., Aesculin Bile Salt Media for Water and Milk Analysis, in Déliberations et Mémoires de la Société Royale du Canada; book II, § IV, page #108:
We have found that just as good results may be obtained from æsculin bile salt agar, as from æsculin bile salt broth in fermentation tubes, and the agar offers the further advantage that any black colonies may be subcultured in 24 hours, whereas if a positive reaction takes place when using æsculin broth, plates must be made before B. coli can be isolated in pure culture.
