Theocritus, translations from.
Theories: of earthquakes. of electricity. of migration.
Thermometer, use of, in navigation.
Thonschiefer, see Clay-slate.
Thunder, subterranean.
Tibitibies.
Tide-borne fruits.
Tierra del Fuego: straits of. islands of.
Tiger, ravine.
Tigers, see Jaguar. black.