The SciencesThe Determination of Tannic Acid in Tanning MaterialsBy Nelson H. Darton on September 12, 1885AdvertisementABOUT THE AUTHOR(S)Recent Articles by Nelson H. DartonOn the Testing of Emery and CorundumOn the Mineralogical Localities in and Around New York CityOn the Indurated Shales between Bergen Hill and the Palisades, N. J.