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Show 6036 481 4039 shown? tances and elevations are shown, together with the surface lines, which is the profile itself. Q Is that in accordance with approved engineering practice? A Absolutely. So far as I know, all profiles for river work, or other purposes, are drawn in that way. Q Do you know of any better way in which it could be shown? A No; it is very satisfactory in practice. The Special Master. I was not intimating any criticism about the propriety of this method of exhibiting profiles. Mr. Blackmar. I understand that, Your Honor. I just wanted to find out if it was what was generally in accordance with engineering practice, or whether it was some special rule of the Department. By Mr. Blackmar: Q Now, there has been something said here, and some of the witnesses have been interrogated about the effect of a change in the stage of the water upon the preparation of these maps. Will you explain to us how a change in the state of the water is provided for? A To start with, so far as possible, we arrange these surveys at the time of the year when the changes will be at a |