In spring and fall, when the difference between the temperature of the air and water can be great, all manner of fogs, vapors, and steam can suddenly occur. I pass a pond on my way to the studio each morning, and in the fall, if I’m early enough, I often see vapor rising off the pond into the cold air. It looks like a dance, this slow and sinuous movement up and away. It will disappear as soon as the sun warms the air, but for a brief time, the effect is mesmerizing. Of Tempo and Temperature, based on one recent morning, serves to prolong the dance. Enjoy!