| 21. | As the potent summer sun heats the humid air, ascending currents of air will cause clouds and spotty thunderstorms.
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| 22. | Straker helped him to the shaft where it was still difficult to breathe even in the current of air.
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| 23. | Sinking currents of air associated with the high will suppress clouds, bringing plenty of hazy sun to the region.
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| 24. | Subsiding currents of air associated with high pressure will promote dry weather over much of the Southern states Wednesday.
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| 25. | The Roman naturalist Pedanius Dioscorides mentioned that antimony sulfide could be roasted by heating by a current of air.
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| 26. | High in the thunderstorm, raindrops in a downward-moving current of air evaporated, chilling the air and causing it to accelerate.
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| 27. | A less known technique is to blow inside the roll, making the streamer flow out on the current of air.
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| 28. | Updrafts, rising currents of air which sustain the thunderstorms that spawn tornadoes, can reach speeds of 100 miles an hour.
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| 29. | The current of air along the walls and especially along the window panes could probably stir up smaller dust particles.
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| 30. | High in the thunderstorm, rain in a downward current of air evaporated, chilling the air and causing it to accelerate.
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