Nature, Volume 39

acid Algæ Annelids appears Astronomical augite birds British Cambrian character chemical cloud College colour comet contains crystals December Decl described direction effect electric energy exhibited experiments fact feet geological give given gneisses Greenwich mean Gresham College haze heat important interesting investigation Islands January lectures light London magnetic mass mathematical matter means measure mesenteries metals meteorites Meteorological method millimetres mineral mineral banding molecules motion muscles Museum natural selection November observations Observatory obtained Olenellus organic origin origin of species P. L. Sclater paper particles phenomena photographs plants plates present probably Prof quartzite recent reference regard region remarkable rocks rotation Royal schists scientific Society species specimens stars structure substance surface temperature theory tion vapour Variable Stars velocity volume