SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Capillary repulsion demonstration. The ball at top centre is balancing on the meniscus of a water column produced by surface tension and capillary action. Even if displaced slightly from the centre of the meniscus, the ball will be drawn back to the centre. This is a combined effect of surface tension and capillary repulsion. Artwork from the tenth volume (second period of 1892) of the French popular science weekly 'La Science Illustree'.
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