Nature, Volume 84

acid agricultural appears atomic weight August austenite batholiths Boulder Clay British cable Canadian Shield carbide carbon cells cementite cent character chemical chemistry College colour comet congress contains Cretaceous crystalline deal described direction discussion disease electrical engineering eutectic exhibit experiments fact feet geological give given glaciers gneiss Halley's comet Huronian illustrated important inches Institute interesting investigation iron J. J. Thomson July laboratory Lake Lake Chad large number larvæ London magnetic manganese mathematical matter means ment metal method nature observations Observatory obtained origin paper peneplain Perseid photographs plant plates Pleistocene practical present pressure probably Prof radium recent reference regard rocks Royal sand scientific silicon Society soil species specimens sulphur surface technical temperature theory tion trypanosome University various volume