shapes of, [43].
Fold topography, [65].
Forbes, J. D., cited, [294].
Fore-set beds, [167].
Forest, destruction of, in relation to agriculture, [156].
Formation of lava reservoirs, [143].
Formations, measurement of thickness of, [48], [49].
Fort Snelling, on Warren River, [327], [331].
Fosses, glacial, [281], [314];
in connection with peat bogs, [430].