GENERAL CONTENTSPrefaceHistory of the subject before the appearance of Newton's "Principia"Extracts from Newton's Principia and "System of the World"Biographical sketch of NewtonBouguer's "The Figure of the Earth"Biographical sketch of BouguerThe Bertier controversyAccount of Maskelyne's experiments on ScheliallienCavendish's "Experiments to determine the mean density of the Earth"Biographical sketch of CavendishHistorical account of the experiments made since the time of CavendishTable of results of experimentsBibliographyIndex