These have power to close the heaven, that it rain not in the days of their prophecy; and have power over the waters to turn them to blood, and to smite the earth with all manner of plagues, as often as they like.
किसी दिन, किसी स्थान पर धूप की कुल अवधि बदली, कोहरा आदि आकाश को धुँधला करनेवाले अनेक घटकों पर निर्भर करती है।