Page:Small-boat sailing; an explanation of the management of small yachts, half-decked and open sailing-boats of various rigs; sailing on sea and on river; cruising, etc (IA smallboatsailing01knig).pdf/239

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great numbers of jelly-fish in the water; and shoals of herrings playing on the surface, indicate a continuance of fine warm weather with light winds. When porpoises are seen gambolling close to shore, and when they ascend tidal rivers, or when sea-birds fly inland, stormy weather is to be expected.