────────────╥───────────╥──────────┬──────────┬──────── Hydraulic ║ ║ │ │ value ║ 1.0mm. ║ │ │ Per cent in ║ ║ Other │ Total │Original soil ║ 13.11 ║sediments.│sediments.│ soil. ════════════╬═════╤═════╬══════════╪══════════╪════════ ║ │ ║ │ │ ║ =A= │ =B= ║ │ │ ║ │ ║ │ │ Insoluble ║ │ ║ │ │ residue ║96.52│12.74║ 13.76│ 71.89│ 70.53 Soluble ║ │ ║ │ │ silica ║ │ 0.36║ │ 10.36│ 12.30 Potash ║ │ „ ║ │ 0.49│ 0.63 Soda ║ │ „ ║ │ 0.12│ 0.09 Lime ║ │ „ ║ │ 0.09│ 0.27 Magnesia ║ │ „ ║ │ 0.44│ 0.45 Manganese ║ │ „ ║ │ 0.06│ 0.06 Ferric oxid ║ │ „ ║ │ 5.60│ 5.11 Alumina ║ │ „ ║ │ 5.51│ 8.09 Phosphoric ║ │ ║ │ │ acid ║ │ „ ║ │ 0.06│ 0.21 Sulfuric ║ │ ║ │ │ acid ║ │ „ ║ │ 0.02│ 0.02 Volatile ║ │ ║ │ │ matter ║ │ „ ║ │ 3.64│ 3.14 ────────────╫─────┼─────╫──────────┼──────────┼──────── Total ║ │13.10║ │ 98.28│ 100.63 Total ║ │ ║ │ │ soluble ║ │ ║ │ │ matter. ║ │ ║ │ │ „ „ ║ │ ║ │ │ bases ║ │ ║ │ │ Soluble ║ │ ║ │ │ silica in ║ │ ║ │ │ crude ║ │ ║ │ │ substance.║ │ ║ │ │ 0.19 ────────────╨─────┴─────╨──────────┴──────────┴──────── =A.= Calculated on the amount of sediment. =B.= Calculated on the amount of soil. It is seen from the above analyses that the clay is by far the richest in mineral constituents, of all the ingredients separated in silt analysis, the amount in the clay being more than twice that of all the others combined. Its volatile matter is also the largest. The large amount of soda, however, is probably in part due to the sodium chlorid used in the precipitation of the diffused clay. The following points in regard to the distribution of the different ingredients are instructive: 1. The iron and alumina exist in almost identical relative proportions in each sediment, making it probable that they are in some way definitely correlated.