1.   At night, it was so impressive when there were no clouds to obscure the countryside below.

2.   Clouds are like vacuum cleaners in the sky, Bruck explained.

3.   Last, and most important, is the cloud of fine ash which rises.

4.   Outside, the rain clouds were gone, and the white, bony moon was full.

5.   The cloud is like a magnet so the water goes through the cracks and goes up.

6.   The clouds were turbulent and gray, a cool, light rain still falling.

7.   There was low cloud, white drifts of mist close down on the ice.

8.   There were dark clouds in the sky.

9.   These clouds are unbroken, and never, for example, look like the billowy cumulus clouds of the Earth.

10.   Those black clouds are a sure sign of rain.