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Show 780 10 do not show the height of the canyon walls, necessarily, but only go up to thirty- nine hundred feet. " THE WITNESS: There may be places on the map where the topography is above thirty- nine hundred feet. I think generally throughout the whole map you will find the upper or limiting contour is a thirty- nine hundred foot contour. " THE SPECIAL MASTER: I feared some one might be con-fused and think was the total height of the canyon walls where the contour is shown here." R. 1861- 1862. He then returned to Greenriver, Utah, over the same route on which he came in, visited some other field parties, and later went back to Lees Ferry. R. 1862. He had one other party in the immediate section, in charge of Mr. Fowler, who was working on the lower river in the vicinity of Warm Creek. He visited Mr. Fowler at this point, going in on horseback from Lees Ferry, Arizona, where Mr. Fowler started his work; Mr. Chenoewith com-menced his work at Greenriver, Utah, and Mr. Trimble at Bluff, Utah. R. 1863. He explained that the map is dependent for direction on the magnetic needle, the elevations dependent on spirit level elevations, and that the horizontal measurements are made with the telescopic alidade used on a plane table. The whole map depends on a system of graphic triangulation, run from a base line; and from this base line the triangu-lation is graphically expanded on plane table sheets. The contour line, as shown on the map, is from a basic |
