A definition of competence, as related to moving water, is given, and some misconceptions regarding the transporting power of currents are briefly considered.

Data on the competency of currents to support debris in suspension are presented and discussed. A new traction-tube method for studying transportation along the stream bed is outlined. Data from traction-tube experiments are compared with data from the usual flume experiments and are found to be completely integrated.

Finally, some tentative applications of the laboratory data to sedimentation are suggested.

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