Evening Republican, Volume 15, Number 197, Rensselaer, Jasper County, 21 August 1911 — Power of Fluorescein. [ARTICLE]

Power of Fluorescein.

A few grains of fluorescein, a substance derived from coal tar, will produce a distinct fluorescence, shining with a yellowish green light when strongly Illuminated, in a hundred tons of water. To produce this result the fluorescein must be divided into countless billions of particles. ■*?'s ? J