Generally, effects assigned to indications connected with the morning twilight hours will come to pass at once, and those of the evening twilight hours, either in the night or within 3 or 7 days; but effects assigned to halos, to dust-storms and to Parigha , will either come to pass at once or take 3 or 7 days; those assigned to the solar rays, to the rainbow, lightning, to parhelion, to clouds and to winds will take effect that same day; those assigned to birds will take 8 days; and those assigned to animals, 7 days.