the human mind, the most vulgar is that of attributing the diversities of conduct and character to inherent natural differences.’ Mill's Principles of Political Economy, vol. i. p. 390. Ordinary writers are constantly falling into the error of assuming the existence of this difference, which may or may not exist but which most assuredly has never been proved. Some singular instances of this will be found in Alison's History of Europe, vol. ii. p. 336, vol. vi. p. 136, vol. viii. pp. 525, 526, vol. xiii. p. 347; where the historian thinks that by a few strokes of his pen he can settle a question of the greatest difficulty, connected with some of the most intricate problems in physiology. On the supposed relation between race and temperament, see Comte, Philosophie Positive, vol. iii. p. 355.
39
As to the proper limits of physical geography, see Prichard on Ethnology, in Report of the British Association for 1847, p. 235. The word ‘climate’ I always use in the narrow and popular sense. Dr. Forry and many previous writers make it nearly coincide with ‘physical geography:’ ‘Climate constitutes the aggregate of all the external physical circumstances appertaining to each locality in its relation to organic nature.’ Forry's Climate of the United States and its Endemic Influences, New York, 1842, p. 127.
40
By unemployed classes, I mean what Adam Smith calls the unproductive classes; and though both expressions are strictly speaking inaccurate, the word ‘unemployed’ seems to convey more clearly than any other the idea in the text.
41
This has been entirely neglected by the three most philosophical writers on climate: Montesquieu, Hume, and M. Charles Comte in his Traité de Législation. It is also omitted in the remarks of M. Guizot on the influence of climate, Civilisation en Europe, p. 97.
42
See the admirable remarks in Laing's Denmark, 1852, pp. 204, 366, 367; though Norway appears to be a better illustration than Denmark. In Rey's Science Sociale, vol. i. pp. 195, 196, there are some calculations respecting the average loss to agricultural industry caused by changes in the weather; but no notice is taken of the connexion between these changes, when abrupt, and the tone of the national character.
43
This expression has been used by different geographers in different senses; but I take it in its common acceptation, without reference to the more strictly physical view of Ritter and his followers in regard to Central Asia. See Prichard's Physical History of Mankind, vol. iv. p. 278, edit. 1844. At p. 92, Prichard makes the Himalaya the southern boundary of Central Asia.
44
There is reason to believe that the Tartars of Thibet received even their alphabet from India. See the interesting Essay on Tartarian Coins in Journal of Asiatic Society, vol. iv. pp. 276, 277; and on the Scythian Alphabet, see vol. xii. p. 336.
45
In Somerville's Physical Geography, vol. i. p. 132, it is said that in Arabia there are ‘no rivers;’ but Mr. Wellsted (Travels in Arabia, vol. ii. p. 409) mentions one which empties itself into the sea five miles west of Aden. On the streams in Arabia, see Meiners über die Fruchtbarkeit der Länder, vol. i. pp. 149, 150. That the sole deficiency is want of irrigation appears from Burckhardt, who says (Travels in Arabia, vol. i. p. 240), ‘In Arabia, wherever the ground can be irrigated by wells, the sands may be soon made productive.’ And for a striking description of one of the oases of Oman, which shows what Arabia might have been with a good river system, see Journal of Geographical Society, vol. vii. pp. 106, 107.
46
Mr. Morier (Journal of Geog. Soc. vol. vii. p. 230) says, ‘the conquest of Persia by the Saracens a. d. 651.’ However, the fate of Persia was decided by the battles of Kudseah and Nahavund, which were fought in 638 and 641: see Malcolm's History of Persia, vol. i. pp. xvi. 139, 142.
47
In 712. Hallam's Middle Ages, vol. i. p. 369.
48
They were established in the Punjaub early in the ninth century, but did not conquer Guzerat and Malwa until five hundred years later. Compare Wilson's note in the Vishnu Purana, pp. 481, 482, with Asiatic Researches, vol. ix. pp. 187, 188, 203. On their progress in the more southern part of the Peninsula, see Journal of Asiatic Society, vol. iii. pp. 222, 223, vol. iv. pp. 28–30.
49
‘A race of pastoral barbarians.’ Dickinson on the Arabic Language, in Journal of Asiat. Society, vol. v. p. 323. Compare Reynier, Economie des Arabes, pp. 27, 28; where, however, a very simple question is needlessly complicated. The old Persian writers bestowed on them the courteous appellation of ‘a band of naked lizard-eaters.’ Malcolm's Hist. of Persia, vol. i. p. 133. Indeed, there are few things in history better proved than the barbarism of a people whom some writers wish to invest with a romantic interest. The eulogy passed on them by Meiners is rather suspicious, for he concludes by saying, ‘die Eroberungen der Araber waren höchst selten so blutig und zerstörend, als die Eroberungen der Tataren, Persen, Türken, u.s.w. in ältern und neuern Zeiten waren.’ Fruchtbarkeit der Länder, vol. i. p. 153. If this is the best that can be said, the comparison with Tartars and Turks does not prove much; but it is singular that this learned author should have forgotten a passage in Diodorus Siculus which gives a pleasant description of them nineteen centuries ago on the eastern side: Bibliothec. Hist. lib. ii. vol. ii. p. 137. ἕχουσι δὲ βίον λῃςτρικὸν, καὶ πολλὴν τῆς ὁμόρον χώρας κατατρέχοντες λῃστεύουσιν, &c.
50
The only branch of knowledge which the Arabians ever raised to a science was astronomy, which began to be cultivated under the caliphs about the middle of the eighth century, and went on improving until ‘la ville de Bagdad fut, pendant le dixième siècle, le théâtre principal de l'astronomie chez les orientaux.’ Montucla, Histoire des Mathématiques, vol. i. pp. 355, 364. The old Pagan Arabs, like most barbarous people living in a clear atmosphere, had such an empirical acquaintance with the celestial phenomena as was used for practical purposes; but there is no evidence to justify the common opinion that they studied this subject as a science. Dr. Dorn (Transactions of the Asiatic Society, vol. ii. p. 371) says, ‘of a scientific knowledge of astronomy among them no traces can be discovered.’ Beausobre (Histoire de Manichée, vol. i. p. 20) is quite enthusiastic about the philosophy of the Arabs in the time of Pythagoras! and he tells us, that ‘ces peuples out toujours cultivé les sciences.’ To establish this fact, he quotes a long passage from a life of Mohammed written early in the eighteenth century by Boulainvilliers, whom he calls, ‘un des plus beaux génies de France.’ If this is an accurate description, those who have read the works of Boulainvilliers will think that France was badly off for men of genius; and as to his life of Mohammed, it is little better than a romance: the author was ignorant of Arabic, and knew nothing which had not been already communicated by Maracci and Pococke. See Biographie Universelle, vol. v. p. 321.
In regard to the later Arabian astronomers, one of their great merits was to approximate to the value of the annual precession much closer than Ptolemy had done. See Grant's History of Physical Astronomy, 1852, p. 319.
51
Indeed it goes beyond it: ‘the trackless sands of the Sahara desert, which is even prolonged for miles into the Atlantic Ocean in the form of sandbanks.’ Somerville's Physical Geography, vol. i. p. 149. For a singular instance of one of these sandbanks being formed into an island, see Journal of Geograph. Society, vol. ii. p. 284. The Sahara desert, exclusive of Bornou and Darfour, covers an area of 194,000 square leagues; that is, nearly three times the size of France, or twice the size of the Mediterranean. Compare Lyell's Geology, p. 694, with Somerville's Connexion of the Sciences, p. 294. As to the probable southern limits of the plateau
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