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"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

Coral Island of Atoll

"Atolls. A coral island commonly consists of a narrow rim of reef, surrounding a lagoon." -Dana, 1880

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o to a, there is shallow water for some distance out; and where not too deep, the bottom is covered here and there with growing corals. Between a and b there is a platform of coral rock, mostly bare at low tide, but covered at high ... b to d is the wooded portion of the island. The whole width (is) from the beach (b) to the lagoon (c)." -Dana, 1880

Section of Coral Island of an Atoll

"represents a section of an island, from the ocean (o) to the lagoon (l). On the ocean side, from o…

"Capillary water held between two soil grains." -Department of Agriculture, 1899

Capillary Water

"Capillary water held between two soil grains." -Department of Agriculture, 1899

"Form of the capillary water surface." -Department of Agriculture, 1899

Capillary Water Surface

"Form of the capillary water surface." -Department of Agriculture, 1899

"Variation in the direction and magnitude of the pressure of the capillary surface due to the form of the surface." -Department of Agriculture, 1899

Capillary Water Surface Variation

"Variation in the direction and magnitude of the pressure of the capillary surface due to the form of…

"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

Capillary Water Surfaces

"Diagram showing three soil grains surrounded by water films: Straight arrows indicate direction and…

"Two soap bubbles connected by a tube showing the movement which takes place due to the difference in curvature." -Department of Agriculture, 1899

Surface Tension

"Two soap bubbles connected by a tube showing the movement which takes place due to the difference in…