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From this period the bifurcations no longer connect different systems of rivers; and, where they continue to take place at the time of great inundations, we see that the waters diverge from the principal recipient only to enter it again after a longer or shorter circuit.
When the bird has resolved to establish its retreat, it first chooses a hanging branch presenting bifurcations which can be utilised as a rigid frame on which to weave the lateral walls of the habitation.
Ruskin's sentence branches into brackets and relative clauses as a straight strong tree branches into boughs and bifurcations, rather shaking off its burden than merely adding to it. It is interesting to remember that Ruskin wrote some of the best of these sentences in the attempt to show that he did understand the growth of trees, and that nobody else did except Turner, of course.
The periodical inundations, and still more the portages, by which boats are passed from one stream to another, the sources of which are in the same neighbourhood, have led to erroneous ideas of the bifurcations and branchings of rivers.
Leary might hope to identify himself before a wary and incredulous world for what he was. He was gone, leaving there in the protecting ledge of shadow the straw-hatted, socked-and-slippered, leg-gartered figure of a plump being, clad otherwise in a single vestment which began at the line of a becomingly low neckband and terminated in blousy outbulging bifurcations just above the naked knees.
When immense rivers may be considered as composed of several parallel furrows of unequal depth; when these rivers are not enclosed in valleys; and when the interior of the great continent is as flat as the shores of the sea with us; the ramifications, the bifurcations, and the interlacings in the form of net-work, must be infinitely multiplied.
The interest we feel in this question is not merely that which attaches to the origin of all great rivers, but is connected with a crowd of other questions, that comprehend the supposed bifurcations of the Caqueta, the communications between the Rio Negro and the Orinoco, and the local fable of El Dorado, formerly called Enim, or the empire of the Grand Paytiti.
The certainty acquired by geographers since the sixteenth century, of the existence of several bifurcations, and the mutual dependence of various systems of rivers in South America, have led them to admit an intimate connection between the five great tributary streams of the Orinoco and the Amazon; the Guaviare, the Inirida, the Rio Negro, the Caqueta or Hyapura, and the Putumayo or Iza.
The elements which may become prepotent in the process, the parts of each successive field round which the associations shall chiefly turn, the possible bifurcations of suggestion, are so numerous and ambiguous as to be indeterminable before the fact. But, although we cannot work the laws of association forward, we can always work them backwards.
The Cordillera of the Andes, considered in its whole extent, from the rocky wall of the island of Diego Ramirez to the isthmus of Panama, is sometimes ramified into chains more or less parallel, and sometimes articulated by immense knots of mountains. We distinguish nine of those knots, and consequently an equal number of branching-points and ramifications. The latter are generally bifurcations.
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