Abstract
IN a recent letter, Wilsdon, Bonnel and Nottage1 suggest that anomalies observed in the vapour pressure, osmotic pressure and flow of water in porous materials and in capillaries are due to oriented chains of water molecules extending to a distance of 50 × 105 cm. from the surface. The possibility of such a structure has been suggested by Hardy2, and by Watson and Menon3, who found that a polished plate floated in air or water at a height of 40 × 105 cm. from a parallel plate. Further experiments4, however, carried out at Sir William Hardy's suggestion showed that the separation of the plates was due to dust or to some similar commonplace cause.
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