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Show 69 -- 66-- Geological Survey are made with the plane table. Of course, the scales vary, but the plane table is recognized by the Survey as being a reasonable accurate instrument for making maps." R. 158. The boat was taken down through the riffle by the boatman while they walked on shore. " He had no special trouble getting down there, being an expert boatman and going down the ordinary way, backwards, holding on the oars." R. 158. The boatman went down fairly light. There was a former survey made of that bar by the Army Engineer Corps, 1900, which has been reduced and sketched on Complainant's Exhibit No. 76, for the purpose of showing the general conditions as they were then and as they are now. R. 158. The principal difference at this particular bar and many of the other bars, apparently, is the widening of the channel. R. 158- 159. " On Plate 4 is my plane table survey, which indicates, by means of cross- hatching, that, with the exception of the very small outcrop on the west bank, perhaps 100 feet long, and on the east bank about 400 feet long, which is Dakota stone, the remaining banks are of dirt. There has apparently been a considerable widening of the flood channel, as shown by this map ( indicating), which is a survey made by the Army Engineers, of November 23, 1909, and the conditions as I found them on September 29, 1928." R. 159. One of the objects of his investigation and the determination of the physical characteristics of the rivers was to determine how shifting the channel was, |