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GREAT ANDAMAN MOUNTAINS

169

feet at low water, has depths from 10 to 14 fathoms throughout the narrower part, and nowhere less than 3 fathoms at low water. The stream is never strong, and the R.I.M.S. Investigator passed through three times while surveying the islands in 1888.

Homfray Strait cuts off Báratáng Island from Middle Andaman, and joins the Andaman at its western mouth. It is intricate and rocky, but has good depths, except at the eastern entrance, where there is a broad bar of 8 feet. The tidal stream is weak, and the narrowest part is 60 yards across.

The surface of Great Andaman is extremely irregular, and a central range of mountains runs from north to south, with an escarped face on the east, and a sloping declivity on the west, where marshy localities abound.

The highest point is Saddle Hill (2400 feet) in North Andaman Mount Harriet (1200 feet) stands on the north shore of Port Blair; and Ford's Peak, in Rutland Island, rises 1400 feet; while there are half a dozen unnamed summits with heights between 1000 feet and 1700 feet.

Narkondam rises 2330 feet, from an oval-shaped base whose greatest diameter is 2 miles, and the crater walls of Barren Island, 2 square miles in area, attain an elevation of 1158 feet.

Little Andaman, some 25 miles south of Rutland, 23 miles long and 17 miles wide, with an area of about 220 square miles, is, on the contrary, level throughout, and gradually rises to a height of 600 feet in the centre. None of the other islands save Rutland attain this elevation.

Owing to its shape and conformation, there are no rivers and but few streams on Great Andaman, and during the dry season— January to April-there is some scarcity of water. Several creeks, however, are of sufficient depth to allow passage of boats for some distance into the interior. In the South Andaman the greater part of the drainage runs into the creeks, which ultimately leads off to the eastern shore, and in the North and Middle Andaman the bulk of the drainage seems to flow through gaps in the eastern range.

Little Andaman is swampy in many parts, and possesses a few small creeks.

On the western side, in which direction Great Andaman slopes gradually, banks of coral occur at distances of 20 and 25 miles from land. There are three of these, varying in length from 9 to 25 miles, all composed of dead coral and sand, with here and there single bunches of live coral 1 or 2 feet high. The water, which is so clear that on a calm day 8 or 9 fathoms looks like 20 feet, varies in its least depths from 3 to 6 fathoms, and, judged from the appearance of the bottom and the absence of reef-building coral, it seems probable that the surface débris of the banks is disturbed by the send of the sea, and that the rollers topple and break on the middle bank in the south-west monsoon, though they may not do so on the others.

This western coast is fully exposed to the south-west monsoon, and is by no means a desirable locality to be in at that

season.

Dalrymple Bank, of the same nature, lies adjacent to Little Andaman, on the same side; but Invisible Bank, to the eastward, has depths of 17 to 50 fathoms, with a rock awash in the centre. This is of bluish-grey sandstone, so that the Bank, taking into account its irregular surface and the rapidly-increasing depths around, may be considered a submerged mountain-range, of the same formation as the oldest part of the Andamans-of which, Flat Rock, an isolated peak, rises alone above the sea. All these banks probably formed islands, or part of the Andamans, when the latter stood at a higher elevation than they do to-day.

Throughout the Archipelago the scenery is of exceeding beauty. The picturesquely undulating surface is clad everywhere, save where artificial clearings have been made, with the most luxuriant jungle, for, situated within the tropics, with a fertile soil, and a climate that for two-thirds of the year is somewhat moist, the islands are covered from hill-top to seabeach with an unbroken mantle of dense vegetation, rendered almost impenetrable by cane-brakes and undergrowth of rattans and other creepers. All along the shores are either stretches of

[blocks in formation]

yellow sand or brilliant green mangroves, and the seas round the islands are of the clearest water imaginable.

The coast-line is everywhere deeply indented, and affords a number-most unusual for such a small group of deep-water harbours and other anchorages, where complete shelter can be found for large ships in all weathers and seasons. The most known and the best—although Port Cornwallis is nearly as good, and has the advantage of being some twelve hours' steaming nearer to Calcutta and Rangoon-is Port Blair, where the Settlement has been placed; but on the same coast of Great Andaman are many others, the more important being, Macpherson's Straits, Shoal Bay, Port Meadows, Colebrooke Passage, and Stewart's Sound. On the west coast are situated, Port Andaman, Kwang-tung Harbour, Ports Campbell and Mouat, while in the Archipelago perfect anchorage is to be found either in Outram Harbour or in Charka-Juru,* Kwang-tung Strait, or Tadma-Juru.

These are well distributed all along the coasts, and were the Andamans situated in some position of greater political or commercial importance, they would form an invaluable possession for this reason. As it is, the islands are exploited merely as a convict establishment-an Indian Botany Bay-and the only industry of any magnitude appertaining to them is that of timber, for which indeed the harbours are very convenient, as the forests worked are all in the neighbourhood of the seashore, or are so placed that after the trees are felled the logs can be hauled by elephants to the many creeks, and floated down to where the vessels engaged in the business are anchored.

The geographical conditions, and more especially the Tertiary sandstone of which the large area of the islands consists, point to a former connection with Arakan, and, in accordance with these indications, it is found that the bulk of the flora is Burmese; but the forest trees are finer, being very lofty and straight, while not a few purely Malayan species find their northern limit in the Andamans. The flora is not related to "Juru," Andamanese = Sea.

*

that of Hindustan and India proper-a coincidence which can be partly explained by the insular climate and difference of soil.

The forests produce valuable woods, which can be used for many trade purposes-furniture; ship, boat and house building; railway carriages and sleepers; paving blocks, boxes, guncarriages and stocks, pianos, etc.; and as profitable minor products, there are canes for furniture, rattans for walking-sticks, and gurjan oil. Some of the woods can be obtained in extremely large quantities; all possibly in sufficiency for any trade that may arise with the islands.

Palms abound; the banian and padouk, that resembles mahogany; marble-wood, of a black, mottled appearance; satinwood; and the iron tree, which turns the edge of an axe, are all found in the forests, in beautiful confusion with cotton-trees, screw-pines, and arborescent euphorbias, and with large clumps of bamboos, 30 and 40 feet high; while all round the coasts, mangroves, the most satisfactory of firewoods, give shelter to lovely orchids.

A very conspicuous feature of the forests is the distribution (apart from the strictly littoral vegetation) into evergreen forest, very full of large gurjan trees (Dipterocarpea), and a leaf-shedding forest, containing a large proportion of padouk (Pterocarpus dalbergioides), or into a mixture of these two types.

The great peculiarity of the Andaman flora is that, with the exception of the Cocos Islands, which are covered with them, and thence indeed derive their name, no coconut palms naturally propagated are found in the Archipelago.* This is the more strange when it is remembered that all the shores of the Bengal Sea are the home of this tree, and that it simply teems in all the islands of the Nicobar group to the south. During the past thirty-five years advantage has been taken of trips in the Station steamer (or by other means) to plant coconuts at suitable

The absence of this tree has doubtless had as much to do with the isolation in which the aborigines have lived as the hostility of the latter, for the islands produce little else than rattans and trepang-which would necessitate arduous collecting-to induce native traders to visit them.

*

CLIMATE

173 localities along the coasts of Great Andaman, and in recent years at Little Andaman. Great numbers of the nuts were consumed by the aborigines, or by wild pigs, but at several places fruit has been obtainable, for many years past, from trees which escaped destruction.

The climate of the Andamans is equatorial in its uniformity, and greatly resembles that of Tenasserim and Mergui. It is not generally healthy for Europeans, but improves from a hygienic point of view when the forest is cleared from any locality. During the first two months of the dry season strong winds blow from the north-east, causing sickness, and damage to vegetation.

As the islands are exposed to the full force of the south-west monsoon, only four months of fair weather (January to April) can be counted on. December and January are the coolest months, with a mean temperature of 79° and a mean minimum of 75°, while March and April are the warmest, with means of 82° and 83° respectively, and a mean daily maximum of 92° at Port Blair, where throughout the year the mean is 80°, the highest 96°, and the lowest 66°; so that the absolute range is 30°. The mean diurnal range is as much as 14° to 15° in February, March, and April, while between June and September it is only 8° or 9°. The mean temperature throughout the year is about 80°.

The south-west monsoon sets in, accompanied by heavy rain, in the early part of May, but occasionally in April, and lasts till October. March is the driest month, and January and February somewhat less so; but the rainy season lasts from the middle of May till the middle of October, and what is called the moderate season, from October to January. During the latter the average monthly rainfall is about 8 inches; in the rainy season it is 16 inches, with twenty-four rainy days per month; while, on the average, throughout the dry season rain falls on ten days to an extent of 5 inches. At Port Blair the mean humidity is 83 per cent., and the average annual rainfall is 117 inches; but elsewhere it varies from 100 to 155 inches, and there are about 180 wet days in the year.

* Comparatively few.

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