Wettability and the Capture, Carriage and Deposition of Particles by Raindrops


DURING rain the particulate matter of the atmosphere is washed to the ground, and it has been suggested that the wettability of the particles affects the efficiency with which they are picked up by the falling droplets. The rain-wash of fungal spores which are not easily wetted has been reported, however, by Gregory1and Hirst2. It was therefore decided to investigate the effect of surface wettability on the manner in which fungal spores are captured, carried and deposited by water droplets. The investigation was carried out with the simplest of apparatus and by direct observation under the microscope.

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  1. 1

    Gregory, P. H., Trans. Brit. Mycol. Soc., 35, 1 (1952).

  2. 2

    Hirst, J. M., Trans. Brit. Mycol. Soc., 36, 375 (1953).

  3. 3

    Chalmers, J. A., Atmospheric Electricity (Pergamon Press, 1957).

  4. 4

    Gregory, P. H., Nature, 180, 330 (1957).

  5. 5

    Gregory, P. H., Guthrie, E. J., and Bunce, M. E., J. Gen. Microbiol., 20, 328 (1959).

  6. 6

    Adam, N. K., Endeavour, 17, 37 (1958).

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DAVIES, R. Wettability and the Capture, Carriage and Deposition of Particles by Raindrops. Nature 191, 616–617 (1961). https://doi.org/10.1038/191616a0

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