430 
IXJJJiX. 
Negroes of valley ofTuy, i. 485 486, 
Negro, Rio, the, ii. 202, ii. .522; its 
source, ii. 378, 387; tributaries 
of the, ii. 393; oscillatious otj 
iii. 11 ; basin of the, iii. 360 
Neiva, valley of, ii. 315 
Nettles, see “ Medusas” 
Nueva liarcelona, «ee “ Barcelona” 
Valencia, see “ Valencia” 
Neveri, river, i. 367, iii. 106 
New Cadiz, i. 145 
Grenada, see “Grenada” 
Spain, see “ Mexico ” 
Toledo, see “Toledo ” 
Niger, sands of the, ii. 165» 
Night in the woods of America, ii. 
162 
Niguator, mountain of, i. 375 
Nile, crocodiles of the, ii. 179, 180; 
periodical risings of the, iii. 12 
Niojjo, or Indian snuff, ii. 505 
Nobility of Spanish America, i. 413; 
badge of, i. 414 
of complexion, i. 415 
Noon, in the tropics, ii. 199 
Numbers, difficulty of acquiring a 
knowledge of, i. 311 
O. 
Oak, magnitude and antiquity of 
the, i. ()2 n 
Observations, astronomical,!. 174, 
175, 350-353, 369, ii. 4, 321, 
4C9, 493 
meteorological, i. 435, 
436 
Obsidian, we,apons made of, i. 100; 
vaiieties of, i. 101; origin of, 
103 
Ocean, temperature of the, i. 15- 
21; currents in the, i. 18, 19, 
phosphorcsence of the, see 
“ Humboldt’s Views of Nature ” 
aSrial, i. 378 
Ochsenberg, mountain of, i. 235 n 
Ocumare, ii. 2 
Oil, obtained from the birds of 
Caripe, i. 258 
of the cocoa nut, i. 291 
of tlie crocoilile, medicinal 
jiroperties of the, ii. 497 
of the manati, ii. 170 
of the turtle egg, ii. 190; sale 
of, ii. 192 
Omaguas, province of the, ii. 506 
Ojitical illusion, i. 389 
Oraug-otang, the, ii. 270 M 
Orange trees of .\merica, i. 215, ii. 
392 
of Cuba, iii. 170 
— of Spain, i. 8 
Orchila, island of, iii. 148; geology 
of, iii. 382 ti ° 
Ordaz, expeditions of, iii. 40-42 
Orinoco, course of the, ii. 95, '138, 
174, 329, iii. 18; waters of the, 
ii. 100, 200, 338; water levels of, 
ii. 225, 297, 325, iii. 14, 15 ; navi- 
gation of, ii. 228, 231, 459, iii. 
7|^8, 16, 18; junctions of the, ii. 
1 ' 429 ; celebrated bifurcation 
of the, ii. 425 ; sinuosities of the; 
ii. 460; breadth of, ii. 196, 218; 
temperature of, ii. 196, 233, 493, 
insalubrious winds of the, ii. 315; 
connection of, with the Amazon, 
ii. 467 ; source of, ii. 168, iii. 9, 
62 ; confluence of, iii. 1 ; periodi- 
cal swellings of, iii. 11; current 
of, iii. 1 5 ; branches of the, iii, 
16-17; origin of the name, iii. 
41; ancient name of, iii. 59; 
tributary streams of, iii. 55, 56 
accident on the, ii. 194 
-aspect of the, from Uru- 
ana, ii. 494 
coast scenery of the, iii. 
7 
district of the, iii. 64, 65 
great (cataracts of the, ii. 
2.35, 250, 259, 314, 329 
islands of the, ii. 218. 
220 
mountains of the, iii. 287 
