Optical illusion.
Orang-otang, the.
Orange trees:
of America.
of Cuba.
of Spain.
Orchila:
island of.
geology of.
Ordaz, expeditions of.
Orinoco:
course of the.
waters of the.
water levels of.
navigation of.
junctions of the.
celebrated bifurcation of the.
sinuosities of the.
breadth of.
temperature of.
insalubrious winds of the.
connection of, with the Amazon.
source of.
confluence of.
periodical swellings of.
current of.
branches of the.
origin of the name.
ancient name of.
tributary streams of.
accident on the.
aspect of the, from Uruana.
coast scenery of the.
district of the.
great cataracts of the.
islands of the.
mountains of the.
monkeys of the.
vegetation on the banks of the.
Lower, dangerous navigation of.
basin of the.
Upper, course of the.
cataracts of.
mountains of.
valley of.
Orotava:
port of.
town of.
fruits of.
society in.
Ortiz, volcanic strata of.
Otaheite, sugar canes of, first introduced into America.
Otters.
Ottomac Indians:
customs of.
physiological phenomena of.
character and habits of.
Ouavapavi monkey.
Oviedo y Banos, the historiographer:
description of Lake Valencia, by.
Oxen.
Pacimoni river.
Padaviri river.
Palm-trees:
forests of.
groves of.
classification of.
utility of the.
of Cuba.
of the Llanos.
of Piritu.
cordage.
cabbage.
oil.
wine.
Palo de Vaca, see Cow-tree.
Pampas, or steppes:
origin of the term.
extent of.
of Buenos Ayres.
