Nature, Volume 52

action amount animals appears applied argon bismuth body bright cause chemical close collection complete connection considerable considered contains course curve described determined direction discussion effect electric engine evidence examination exhibited existence experiments fact further give given heat illustrated important increase indicate Institute interesting iron known less light lines London matter means measure meeting metals method nature object observations obtained occur origin passed period photographs physical plants plates position possible practical present pressure probably produced Prof published question received recent recorded reference regard relation remains remarkable represented rocks Royal scientific shown side Society species spectrum stars taken temperature theory tion unit University various volume whole