Rensselaer Republican, Volume 27, Number 37, Rensselaer, Jasper County, 21 May 1896 — VALUABLE COLOR TEST. [ARTICLE]

VALUABLE COLOR TEST.

How the Coarse of Water In German Rivers Was Determined. A color test on a largo shale occurred recently near Geseke, Germany. The Volmed, the Waid and the Heder are three brooks which have their source near Geseke, and according to tradition their waters had subterranean connection with the Alme, a mountain stream whosebed is some five miles distant. Millers located on the lower Alme, says the Philadelphia Times, dumped refuse in certain eddies ol the upper portion of the stream, and the millers oh. the Volmede, the Weid and the Heder claimed that by doing this the water supply of the latter streams was materially diminished, 'To determine the connection about four pounds of potassium fluorescinate was dumped into one of the Heder. This substance is marvelously powerful, and a solution containing one part jin 10,000,000 sbows a dlrtinct fluorescence in transmitted light. Twenty-five hours later the Heder took on a beautiful dark green color, showing conclusively the connection between the two streams. An experiment at another point showed with equal clearness that there was a subterranean connection between the Wald and the Volmede, though in this ease 44 hours elapsed between the depositing-afi tha dye stuff in the Alme and the appearance of the coloration in the other streams.