gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1924.020.106.02 The Chemical Composition and Optical Properties of a Basaltic Hornblende from Hungary Vendl Miklós Ph.D. Professor of Mineralogy and Geology in the Mining Academy of Sopron, Hungary 9 1924 20 106 237 240 Copyright © 1924, The Mineralogical Society 1924