A theoretical analysis of rate of capillary absorption by absorbent media is presented which emphasizes the critical importance of environmental factors to the rate of liquid absorption (as well as factors which are specific to the structure of the absorbent mass). The theoretical relationships of environmental factors and capillary structure are com bined in an over-all rate of flow equation. From this equation many theoretical con clusions of interest may be drawn. The equation also suggests principles for design of capillary structures for optimum rate of absorption in proper relationship to external or competing environmental factors.
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