| | | | | | ...... | ...... | ...... | ...... | ...... | ...... | ------------------+------------------+------------------+----------------+--------------+----------------+ .3615 | .0730 | .1800 | .3060 | .1525 | .19526 | ------------------+------------------+------------------+----------------+--------------+----------------+ The following table[36] gives the percentage of material carried in suspension by various rivers: | | | | |Height |Thickness | | Mean | | |in Feet |of Sediment | | Annual | | |of Column |in Inches | Drainage |Discharge | | Ratio of |of Sediment |if Spread | Areas in |(in Cubic | |Sediment to |with a Base | over | Square |Feet.) per| Total Tons | Water by | of One |Drainage River. | Miles. | Second. | Annually. | Weight. |Square Mile.| Area. -----------+-----------+----------+-------------+------------+------------+-------- Potomac | 11,043 | 20,160 | 5,557,250 | 1 : 3,575 | 4.0 | .00433 Mississippi| 1,244,000 | 610,000 | 406,250,000 | 1 : 1,500 | 241.4 | .00223 Rio Grande | 30,000 | 1,700 | 3,830,000 | 1 : 291 | 2.8 | .00116 Uruguay | 150,000 | 150,000 | 14,782,500 | 1 : 10,000 | 10.6 | .00085 Rhone | 34,800 | 65,850 | 36,000,000 | 1 : 1,775 | 31.1 | .01075 Po | 27,100 | 62,200 | 67,000,000 | 1 : 900 | 59.0 | .01139 Danube | 320,300 | 315,200 | 108,000,000 | 1 : 2,880 | 93.2 | .00354 Nile | 1,100,000 | 113,000 | 54,000,000 | 1 : 2,050 | 38.8 | .00042 Irrawaddy | 125,000 | 475,000 | 291,430,000 | 1 : 1,610 | 209.0 | .02005 Mean | 334,693 | 201,468 | 109,649,972 | 1 : 2,731 | 76.65 | .00614 -----------+-----------+----------+-------------+------------+------------+-------- The composition of rain-water falling near London, as determined by analysis, was as follows:[37] Organic carbon .99 part in 1,000,000 of water. Organic nitrogen .22 „ „ „ „ „ Ammonia .50 „ „ „ „ „ Nitrogen as nitrates and nitrites .07 „ „ „ „ „ Chlorine 6.30 parts in „ „ „ Total solids 39.50 „ „ „ „ „