Obsidian: weapons made of. varieties of. origin of.

Ocean: temperature of the. currents in the. phosphoresence of the, see Humboldt's Views of Nature. aerial.

Ochsenberg, mountain of.

Ocumare.

Oil: obtained from the birds of Caripe. of the cocoa nut. of the crocodile, medicinal properties of the. of the manatee. of the turtle egg. sale of.

Omaguas, province of the.

Optical illusion.

Orang-otang, the.

Orange trees: of America. of Cuba. of Spain.

Orchila: island of. geology of.