. The earth and its inhabitants ... Geography. 244 AUSTRALASIA. natives not even approximate estimates are available. Nevertheless tlie present population may be fixed at not less than seven millions, or more than nine millions, in a total area of about 118,000 square miles. Although forming a group quite distinct from Indonesia, from which they are separated by two marine abysses, one nearly two thousand five hundred, the other over two thousand five hun- Fig. 106.—The three Isthmuses of Indonesia and the Philippines. Scale 1 : 18,000,000. dred fathoms deep, the Philip- pines are connected wi
. The earth and its inhabitants ... Geography. 244 AUSTRALASIA. natives not even approximate estimates are available. Nevertheless tlie present population may be fixed at not less than seven millions, or more than nine millions, in a total area of about 118,000 square miles. Although forming a group quite distinct from Indonesia, from which they are separated by two marine abysses, one nearly two thousand five hundred, the other over two thousand five hun- Fig. 106.—The three Isthmuses of Indonesia and the Philippines. Scale 1 : 18,000,000. dred fathoms deep, the Philip- pines are connected with the southern lands by three long ridges, partly rising above the surface, partly covered by shallow water. Of these three isthmuses the north- western is the most regular and best developed, being constituted for over half its extent by the long narrow island of Paragua. Between Mindoro and the north-west point of Borneo the deepest parts of the sill limited by Balabac and Bangney do not average more than tweoty- five fathoms. Balabac Strait between Paragua and Borneo is occupied by reefs resem- bling in outline the alluvial islands of a delta, and formed under the influence of the marine current which, during the south-west monsoon, sets strongly towards the Sulu Sea. The second isthmus is formed by the Sulu Archipelago, which connects the north-east point of Borneo with the western extremity of Min- danao. But here the shallow channel, through which the deep waters of the Sulu Sea communicate with the still deeper Celebes Sea, is traversed by a system of alternating currents over two hundred and fifty fathoms in depth. Lastly, east of the nearly circular trough of the Celebes Sea the penin- sula of Minahassa, with the Sanguir Archipelago and other islands, develop a third isthmus sweeping round to the southernmost point of Mindanao. This connecting. Depths. 1 0 to 1,000 Fathoms. 1,000 to Fathoms. 2,000 Fathoms and upwards. 300 Please note that these images
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeography, bookyear18
