The river was
about 180 to 200 yards in width, but much obstructed with rocks and
islands; the stream ran at about four miles per hour, and the rapids and
falls were so numerous that the roar of water had been continuous
throughout our march from Murchison Falls. By observations of Casella's
thermometer I made the altitude of the river level at the island of
Patooan 3,195 feet; thus from this point to the level of the Albert lake
at Magungo there was a fall of 475 feet--this difference being included
between Patooan and the foot of Murchison Falls: the latter, being at
the lowest estimate 120 feet, left 355 feet to be accounted for between
Patooan and the top of the falls. As the ledges of rock throughout the
course of the river formed a series of steps, this was a natural
difference in altitude that suggested the correctness of the
observations.
At the river level below Karuma Falls I had measured the altitude at
3,996 feet above the sea level. Thus, there was a fall from that point
to Patooan of 801 feet, and a total of 1,276 feet in the descent of the
river from Karuma to the Albert N'yanza. These measurements, most
carefully taken, corroborated the opinion suggested by the natural
appearance of the river, which was a mere succession of cataracts
throughout its westerly course from Karuma.
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