Africa and its inhabitants . ea. a series of abrupt defiles. It is navigable by gunboats for 36 miles fiom its mouthto a gate of vertical rocks rising 100 feet above the stream, and supposed bythe natives to be kept open bj^ a powerful fetish, who, however, may close thepassage at any moment. Higher \ip follow still more formidable gorges, in one of•which the river, from 1,000 to over 2,000 feet broad on the plains, is contracted toa narrow channel 20 feet wide. The Kwilu, which in some respects offers greaiter CLIMATE OF THE GABOON REGION. SJl facilities for penetrating inlanrl than the Ogowa
Africa and its inhabitants . ea. a series of abrupt defiles. It is navigable by gunboats for 36 miles fiom its mouthto a gate of vertical rocks rising 100 feet above the stream, and supposed bythe natives to be kept open bj^ a powerful fetish, who, however, may close thepassage at any moment. Higher \ip follow still more formidable gorges, in one of•which the river, from 1,000 to over 2,000 feet broad on the plains, is contracted toa narrow channel 20 feet wide. The Kwilu, which in some respects offers greaiter CLIMATE OF THE GABOON REGION. SJl facilities for penetrating inlanrl than the Ogoway, lea(ls to a region within 60 milesof the Congo, which is icportcd to abound in copper and lead deposits. Climate. The broad features of the climate are revealed by the periodical rise and tallof the fluvial waters. Thus the Ogoway continues to rise from September to themiddle of December, and then falls to the end of January, indicating the season of Tig. 189.—Lines of Equal Cloidiness 1 : ?j,-HAi Jdile*. the winter rains followed bv a short interval of Urn- weuthor. The. follow thegreat ruins, when the river again begins to , attaining .1. the first week in May, and again regularly subsiding till Septomb^.r. Therainfall gradually diminishes from the Hio del to < a,.- ,-*and thence to the Portuguese terntory. falling from about imb-s north of .hoGaboon to 100 about the equator, but varying greatly on the Loango whoreit fell from 63 inches in 1870 to no more U: in 1S77. The quanttty ofmoisture precipitated corresponds geueraUy to the frcqueucy and dcu»..y of the 392 WEST AFRICA. Debulosity, and M. Teisserenc de Borts chart indicating the lines of equal cloud-ness for the whole continent, shows that fogs and mists occur most frequently inthe Gaboon and Ogoway basins. In the same region the annual temperature has an extreme range of about45° F., falling from 100° to 57° a
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