1846. ft. in. deg. A. B. May 21 10 11 72 6.66 7.00 " 25 10 11 73 9.08 9.12 " 27 10 10 78 7.80 9.00 " 29 11 0 74 7.30 8.10 June 2 11 1 75 4.80 5.45 " 4 11 1 75 7.87 6.10 " 6 11 4 75 4.60 4.90 " 8 11 4 75.5 5.48 5.60 " 10 10 4 76 6.70 6.80 " 12 10 8 76 6.50 6.30 " 14 10 5 76.5 6.00 6.00 " 16 10 4 76.5 6.47 6.15 " 20 10 4 77 7.08 7.40 " 22 10 2 77 9.88 9.00 " 24 9 8 77 8.40 8.48 " 26 8 9 77.5 8.25 8.78 " 28 8 0 79 9.10 9.58 July 1 7 2 79.5 9.15 9.25 July 3 7 2 79.5 9.63 10.00 " 6 6 2 81 8.20 7.57 " 8 6 0 81 7.30 6.96 " 10 6 1 81 6.12 6.28 " 13 5 9 82 7.72 7.30 " 15 5 10 82 6.67 6.60 " 17 5 10 82 4.45 4.57 " 20 5 4 82 6.07 5.75 " 24 3 10 84 5.76 5.72 " 27 3 1 84 4.77 4.60 " 29 3 11 84.5 4.28 4.13 Aug. 1 2 6 85 4.40 4.44 " 3 2 0 84 3.18 3.34 " 5 1 9 83 3.56 3.40 " 7 1 5 83 2.85 2.85 " 10 1 6 83 3.03 2.92 " 13 2 8 84 2.97 3.00 The mean average of column A. is 6.32. " " " " " B. is 6.30. Transcriber's note: This table has been reproduced exactly as in the original. 'By comparison with distilled water,' says the same, 'the specific gravity of the filtered river water we found to be 1.823; pint of such water at 60 deg. weighs 7,297.40.' Engineer Forehay says the sediment is 1 to 1,800 by weight, or 1 in 3,000 by volume. Professor Riddell also comes to the following conclusions, after an analytic investigation of the sediment. He took one hundred grains from the river margin, dried it at 212 deg. Fahrenheit, before weighing, and found it to contain: _Grains._ Silica, 74.15 Alumina, 9.14 Oxide of iron, 4.56 Lime, 2.08 Magnesia, 1.52 Manganese, 0.04 Potassa,} not determined Soda, } Phosphoric acid, 0.44 Sulphuric acid, 0.07 Carbonic acid, 0.74 Chlorine, 0.01 Water, 3.12 Organic matter, 3.10 ----- Total, 98.97