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 endways into boards; and large animals have been lifted and carried considerable distances. In one case a cow was lifted out of a high corral and deposited, not seriously injured, several hundred feet away.

The cause of the tornado cannot always be determined; in a few instances it has been assumed by reason of strong circumstantial evidence. During the passage of a northerly



cyclone that has bent its path into the south, great volumes of dry, cold air are sometimes whirled into regions where the air is