Nature, Volume 100

acid Agriculture ammonia Anemometers apparatus appears application appointed Association Board Botany British cent chemical chemistry chemists coal College colour Committee considerable Council course deal December Department described direction discussion effect electric Engineering experience Geological German given gives Government HATTON GARDEN illustrated important increase industry Institute interest investigations iron J. J. Thomson Journal laboratory larvæ lectures London magnetic manufacture mathematical means ment metal method Ministry of Munitions Museum National Physical Laboratory NATURE November observations Observatory obtained October Optical organisation paper physical plants practical present president Price problems production Prof published pyrometers recent regard Royal Society schools scientific September South South Africa species stars supply survey technical temperature theory tion University University of London utilised various W. E. Castle W. H. Young