gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1921.019.92.04 Report of the Committee on British Petrographic Nomenclature Watts W. W. Chairman Evans John W. Elsden J. Vincent Flett J. S. Hatch F. H. Prior George T. Rastall R. H. Teall J. J. H. Thomas Herbert H. Tyrrell G. W. Campbell Smith W.

Dr. Arthur Hohmes's signature has not been obtained, on account of his absence abroad.

 3 1921 19 92 137 147 Copyright © 1921, The Mineralogical Society 1921