The SciencesRoscoelite, A Vanadium MicaBy James Blake on August 26, 1876AdvertisementABOUT THE AUTHOR(S)Recent Articles by James BlakeResearches on the Relations between the Spectra of the Elements of Inorganic Substances and their Physiological ActionOn the Connection of the Molecular Properties of Inorganic Compounds with their Action upon the Living Animal Organism