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changes of shape and brightness, of indi-
vidual rice-grains. Some granules become
larger or smaller. Some seem to rise out of
a mist, as it were, and to become clearer.
Others grow feebler. Some are split in two.
Some are rotated through a right angle in a
minute or less, although each of the grains
may be the size of Great Britain. Gener-
ally they move together in groups of very
465