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Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury has the opposite effect because of its cohesive properties.

Capillarity

Capillarity. On the left, water is higher in the smaller tubes due to adhesion. On the right, mercury…

"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…

"The Remora, the sucking-fish, or sucker. By means of the suctorial disk, a transformation of the spinous dorsal fin, the species can attach themselves to any flat surface. The adhesion is so strong that the fish can be dislodged only with difficulty, unless pushed forward with a sliding motion. Being bad swimmers, they attach themselves to vessels, or to animals having greater power of locomotion than themselves; but they cannot be regarded as parasites, as they do not obtain their food at the expense of their host."—(Charles Leonard-Stuart, 1911)

Remora

"The Remora, the sucking-fish, or sucker. By means of the suctorial disk, a transformation of the spinous…

"Since the strength of the fibers in adhesion is very much less than in tension and compression, adhesion enters into nearly every test as an important factor. Thus, if a piece of wood consisting of several fibers is tested in tension, the fibers a and b would probably not break at all, but be merely pulled out, the failure, as far as they are concerned, being due to lack of adhesion and not to a lack of tensile strength. Every tension test presents numerous cases of this king, the broken fibers presenting no even fracture, but being splintered and drawn out especially if the wood is good."—Government Printing Office, 1897

Behavior of Fibers in Tension Test

"Since the strength of the fibers in adhesion is very much less than in tension and compression, adhesion…