Nature, Volume 91

acid appears April Aristotle Astronomical atomic weight atoms auxetics axis birds British carbon cent chemical chemistry chromosphere College colour committee contains described direction discussion edition effect electric engineering experiments fact flywheel Geological given gives gyrostat heat Heiligenschein helium Hermann et Fils hydrogen illustrated important increase Indian instrument interest investigation J. J. Thomson kathode laboratory larvæ lectures light lines London magnetic March mathematics matter measured ment metal Meteorological method Museum National Physical Laboratory nature nitrogen observations Observatory obtained paper pearlite photographs physical plants plates position practical present president Price produced Prof Protozoa published radio-active radium rays recent recorded reference Royal Society schools scientific South species spectra spectrum stars steel surface temperature theory tion Trypanosome tube University vanadium various velocity volume wind zoological