„ epochs, influence on denudation, [46]

Gravitation does not account for the heat required, [106]

„ does not account for motion of the stars, [105]

„ insufficient to account for heat of nebulæ, [27]

Groombridge 1830, motion of, [15]

„ not an eject, [106]

„ Prof. Newcomb on motion of, [15]

Grove, Sir W. R., on the pre-nebular condition of matter, [78]

Haeckel, Prof, on geological time, [67]

Haughton, Prof., method of estimating rate of denudation, [50]