‘The difference between the climates of the east and west coasts of continents and islands, has also been observed in the southern hemisphere but here the west coasts are colder than the east, while in the northern hemisphere the east coasts are the colder.’ Meyen's Geography of Plants, 1846, p. 24.
181
Mr. Darwin, who has written one of the most valuable works ever published on South America, was struck by this superiority of the eastern coast; and he mentions that ‘fruits which ripen well and are very abundant, such as the grape and fig, in latitude 41° on the east coast, succeed very poorly in a lower latitude on the opposite side of the continent.’ Darwin's Journal of Researches, Lond. 1840, p. 268. Compare Meyen's Geog. of Plants, pp. 25, 188. So that the proposition of Daniell (Meteorological Essays, p. 104, sec. xiv.) is expressed too generally, and should be confined to continents north of the equator.
182
The trade-winds sometimes reach the thirtieth parallel. See Daniell's Meteorological Essays, p. 469. Dr. Traill (Physical Geography, Edin. 1838, p. 200), says, ‘they extend to about 30° on each side of the equator:’ but I believe they are rarely found so high; though Robertson is certainly wrong in supposing that they are peculiar to the tropics; History of America, book iv. in Robertson's Works, p. 781.
183
‘In the northern hemisphere the trade-wind blows from the north-east, and in the southern from the south-east.’ Meyen's Geog. of Plants, p. 42. Compare Walsh's Brazil, vol. i. p. 112, vol. ii. p. 494; and on the ‘tropical east-wind’ of the Gulf of Mexico, see Forry's Climate of the United States, p. 206. Dr. Forry says that it has given to the growth of the trees ‘an inclination from the sea.’
184
Respecting the causes of the trade-winds, see Somerville's Connexion of the Physical Sciences, pp. 136, 137; Leslie's Natural Philosophy, p. 518; Daniell's Meteorological Essays, pp. 44, 102, 476–481; Kaemtz's Meteorology, pp. 37–39; Prout's Bridgewater Treatise, pp. 254–256. The discovery of the true theory is often ascribed to Mr. Daniell; but Hadley was the real discoverer. Note in Prout, p. 257. The monsoons, which popular writers frequently confuse with the trade-winds, are said to be caused by the predominance of land, and by the difference between its temperature and that of the sea: see Kaemtz, pp. 42–45. On what may be called the conversion of the trades into monsoons, according to the laws very recently promulgated by M. Dove, see Report of British Association for 1847 (Transac. of Sections, p. 30) and Report for 1848, p. 94. The monsoons are noticed in Humboldt's Cosmos, vol. ii. p. 485; Asiatic Researches, vol. xviii. part i. p. 261; Thirlwall's History of Greece, vol. vii. pp. 13, 55; Journal of Geograph. Society, vol. ii. p. 90, vol. iv. pp. 8, 9, 148, 149, 169, vol. xi. p. 162, vol. xv. pp. 146–149, vol. xvi. p. 185, vol. xviii. pp. 67, 68, vol. xxiii. p. 112; Low's Sarawak, p. 30.
185
Lyell's Principles of Geology, pp. 201, 714, 715; see also Somerville's Physical Geography, vol. ii. p. 71. And on this confining power of the Cordillera of the Andes, see Azara, Voyages dans l'Amérique Méridionale, vol. i. p. 33. According to Dr. Tschudi, the eastern chain is properly the Andes, and the western the Cordillera; but this distinction is rarely made. Tschudi's Travels in Peru, p. 290.
186
On the rain of Brazil, see Daniell's Meteorological Essays, p. 335; Darwin's Journal, pp. 11, 33; Spix and Martius's Travels in Brazil, vol. ii. p. 113; Gardner's Travels in Brazil, pp. 53, 99, 114, 175, 233, 394.
187
Dr. Gardner, who looked at these things with the eye of a botanist, says that near Rio de Janeiro the heat and moisture are sufficient to compensate even the poorest soil; so that ‘rocks, on which scarcely a trace of earth is to be observed, are covered with vellozias, tillandsias, melastomaceæ, cacti, orchideæ, and ferns, and all in the vigour of life.’ Gardner's Travels in Brazil, p. 9. See also on this combination, Walsh's Brazil, vol. ii. pp. 297, 298, a curious description of the rainy season: ‘For eight or nine hours a day, during some weeks, I never had a dry shirt on me; and the clothes I divested myself of at night, I put on quite wet in the morning. When it did not rain, which was very rare, there shone out in some places a burning sun; and we went smoking along, the wet exhaling by the heat, as if we were dissolving into vapour.’
188
On the natural history of Brazil, I have compared a few notices in Swainson's Geography of Animals, pp. 75–87, with Cuvier, Règne Animal, vol. i. p. 460, vol. ii. pp. 28, 65, 66, 89, vol. iv. pp. 51, 75, 258, 320, 394, 485, 561, vol. v. pp. 40, 195, 272, 334, 553; Azara, Amérique Méridionale, vol. i. pp. 244–388, and the greater part of vols. iii. and iv.; Winckler, Geschichte der Botanik, pp. 378, 576–578; Southey's History of Brazil, vol. i. p. 27, vol. iii. pp. 315, 823; Gardner's Brazil, pp. 18, 32–34, 41–44, 131, 330; Spix and Martius's Brazil, vol. i. pp. 207–209, 238–248, vol. ii. pp. 131, 160–163. And as to the forests, which are among the wonders of the world, Somerville's Physical Geog. vol. ii. pp. 204–206; Prichard's Physical History, vol. v. p. 497; Darwin's Journal, pp. 11, 24; Walsh's Brazil, vol. i. p. 145, vol. ii. pp. 29, 30, 253.
189
This extraordinary richness has excited the astonishment of all who have seen it. Mr. Walsh, who had travelled in some very fertile countries, mentions ‘the exceeding fecundity of nature which characterizes Brazil.’ Walsh's Brazil, vol. ii. p. 19. And a very eminent naturalist, Mr. Darwin, says (Journal, p. 29), ‘In England, any person fond of natural history enjoys in his walks a great advantage, by always having something to attract his attention; but in these fertile climates, teeming with life, the attractions are so numerous that he is scarcely able to walk at all.’
190
Azara (Amérique Méridionale, vol. ii. pp. 1–168) gives a curious, but occasionally a disgusting account of the savage natives in that part of Brazil south of 16°, to which his observations were limited. And as to the inhabitants of other parts, see Henderson's History of Brazil, pp. 28, 29, 107, 173, 248, 315, 473; M'Culloh's Researches concerning America, p. 77; and the more recent account of Dr. Martius, in Journal of Geograph. Society, vol. ii. pp. 191–199. Even in 1817, it was rare to see a native in Rio de Janeiro (Spix and Martius's Travels in Brazil, vol. i. p. 142); and Dr. Gardner (Travels in Brazil, pp. 61, 62) says, that ‘more than one nation of Indians in Brazil’ have returned to that savage life from which they had apparently been reclaimed.
191
Sir C. Lyell (Principles of Geology, p. 682) notices ‘the incredible number of insects which lay waste the crops in Brazil;’ and Mr. Swainson, who had travelled in that country, says ‘The red ants of Brazil are so destructive, and at the same time so prolific, that they frequently dispute possession of the ground with the husbandman, defy all his skill to extirpate their colonies, and fairly compel him to leave his fields uncultivated.’ Swainson on the Geography and Classification of Animals, p. 87. See more about these insects in Darwin's Journal, pp. 37–43; Southey's History of Brazil, vol. i. pp. 144, 256, 333–335, 343, vol. ii. pp. 365, 642, vol. iii. p. 876; Spix and Martius's Travels in Brazil, vol. i. p. 259, vol. ii. p. 117; Cuvier, Règne Animal, vol. iv. p. 320.
192
The cultivated land is estimated at from 1½ to 2 per cent. See
