Bulletin of the National Research Council, Nummers 77-80

a-particles actinium adiabatic air mass amount Ångström anticyclones atmosphere atomic weight average axis biotite Cenozoic cent changes circulation Cleveite Coast and Geodetic cold common lead crust Crystallization curve cyclones deflections density deposits determined direction disintegration earth effect elements elevation energy equation equilibrium eruptions feet Figure force friction gases geological gradient granite gravity halos heat helium horizontal isobars isostasy isotopes Joly Kilauea latitude lava lead ratios level surfaces magma mean sea-level measured Mesozoic meteorological meters method million motion National Research Council North Norway observations obtained occur ocean Paleozoic pegmatites pendulum period pitchblende pole Pre-Cambrian pressure radioactive radioactive minerals radium regions rocks rotation sediments solar radiation stations stratosphere temperature theory Thorianite thorite thorium tidal tides tion torsion balance triangulation U. S. Coast uraninite uranium variation velocity vertical volcanoes water vapor weather wind Ytterby