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