Many times they
passed by the mouths of iguarapes, or little affluents, with black
waters.
The coloration of these waters is a very curious phenomenon. It is
peculiar to a certain number of these tributaries of the Amazon,
which differ greatly in importance.
Manoel remarked how thick the cloudiness was, for it could be clearly
seen on the surface of the whitish waters of the river.
"They have tried to explain this coloring in many ways," said he,
"but I do not think the most learned have yet arrived at a
satisfactory explanation."
"The waters are really black with a magnificent reflection of gold,"
replied Minha, showing a light, reddish-brown cloth, which was
floating level with the jangada.
"Yes," said Manoel, "and Humboldt has already observed the curious
reflection that you have; but on looking at it attentively you will
see that it is rather the color of sepia which pervades the whole."
"Good!" exclaimed Benito. "Another phenomenon on which the _savants_
are not agreed."
"Perhaps," said Fragoso, "they might ask the opinions of the caymans,
dolphins, and manatees, for they certainly prefer the black waters to
the others to enjoy themselves in.
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