Capillary Water Surfaces

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“Diagram showing three soil grains surrounded by water films: Straight arrows indicate direction and magnitude of the pressure of the capillary water surfaces; curved arrows indicate movement of water resulting from difference in pressure.” -Department of Agriculture, 1899

Source

Geo. Wm. Hill, ed. Yearbook of the United States Department of Agriculture (Washington, DC: Government Printing Office, 1898)

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