Publisher's Synopsis
Excerpt from A Preliminary Study of Chemical Denudation
The African material is very scanty. In addition to the figures already cited for the Nile, with a drainage area estimated at square miles, I have found only analyses of three small Algerian rivers which exhibit all the peculiarities of waters from other semi-arid districts. Ignoring the latter I shall estimate that square miles in Africa are represented by the Nile with the denudation factor of 16 tons. I shall also assume that square miles are fairly equivalent in character to South America, with the same composition of the waters and the same denudation factor of 50 tons. The desert regions, like the Sahara, of course count for nothing. Analyses of water from the Niger, Congo, Orange, and Zambesi are much needed.
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