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Show 504 at the time they broke they made quite a roar, and part actual timing and part estimating, I should say that the time for the cycle was anywhere from fifteen to forty- five minutes at that particular point. " Q. How often did these occur in a day? " A. They appeared to adhere to one section of the river, and to occur in cycles, the cycles taking from fifteen to perhaps forty- five minutes." R. 1262. The sand waves must have moved down the stream to some extent. " it was undoubtedly a sand movement that was causing this surface wave motion, but the motion down the river was not fast. " In navigating these we turned the boat substantially into the trough, and simply the current carried us over wave after wave, with practically no rocking; and if we could catch this formation of the smooth form in time so as to get the boat into position, there was practically no difficulty. " But if we were plowing ahead, expecting to go through a point where it was merely choppy, and the waves suddenly formed, before we could slow the boat down and the boatman take the oars and get the boat into position, we frequently shipped considerable water." R. 1262- 1263. He means that normally they road the trough of the wave and simply floated down the side ways. They shut off the power, slowed down materially for those chops, " and then if necessary, if the smooth form started to materialize, we shut the power off instantly, |