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Show 5810 3810 257 would take place, because the factors controlling the amount of material carried by the river are, slope of the river; the velocity; the kind of material carried; and the quantity carried. For a given veolocity, you may find that the river is carrying at one time only a very small proportion of sus-pended matter; whereas for a velocity that is practically the same, or a little larger, it may carry many times that amount of material; in that case, it is probably a question of how much material is available. By Mr. Blackmar: Q I notice in connection with some of your papers that you use the expression " bed load"; just what do you mean by that? A The term " bed load", as I use it, is one that Gilbert introduced in his work on the " Transportation of Debris by Moving Water"; he referred to a certain amount of material that is transported along the bed of the river, and it is in that way that I refer to material along the Colorado River and its tributaries that we do not got in our suspended matter samples. Q You mean an amount of material that simply rolls along the bed, without suspended in the water; is that |