59S 
INDEX. 
N. 
Naphtha. See Bitumen. 
Nautilus. See Paper Nautilus. 
Nepenthes, one of the most singular productions of the vege- 
table world, iii. 196 described — the goodness of Providence 
displayed in the formation of the nepenthes, 197. an object 
of superstition among the inhabitants of Madagascar, 198. 
Nightingale, i. 486. the favourite of the poets — a solitary bird at- 
tached to one place, 487. nest and young, 487 — 489. descrip- 
tion — migrate, and when, 490. 
Nine-Killer. See Shrike. 
Nitre, its composition — where found — account of the collection of 
native nitre at Molfetta, iii. 446. in Egypt, 447. in America 
• — circumstances principally conducive to the formation of nitre 
enumerated, 448. how obtained from the substances in which it 
is formed, 449 — 451. 
Nurnidian Crane. See Crane. 
Nut Weevil, opinions of naturalists respecting its introduction into 
the nut — manner in which it escapes, ii. 279. lies dormant in 
the winter, and casts its skin in the spring — Corn weevil , account 
of, 280. Diamond beetle , the most splendid of the tribe — de- 
scribed, 281. 
O. 
Oculus Mundi. See Hydrophane. 
Oil Beetle, why so called — described, ii. 293. where found — eggs 
and larva, 294. Spanish fly described — where found, 295. 
Olive, its several varieties cultivated for the same purpose, iii. 39. 
described — where found, 40. best situation for cultivating, 41. 
particulars relative to the cultivation, 42. how preserved, 43. 
sweet olives, 44 extracting of the oil, 45. 
Onyx. See Agate. 
Opal esteemed for its colours, iii. 405. a very valuable stone, 406. 
where found, 407. Moon stones , what, 408. 
