Q. Why do ladies fan themselves in summer, to make their faces cool?
A. The fan puts the air in motion, and makes it pass more rapidly over their face; and (as the temperature of the air is always lower than that of the human face) each puff of air carries off some portion of heat from the face.
Q. Does fanning the air make the air itself cooler?
A. No; fanning makes the air hotter and hotter.
Q. Why does fanning the air increase its heat?
A. By causing the air continually to absorb heat from the human body which it passes over.
Q. If fanning makes the air hotter, how can it make a person feel cooler?
A. Fanning makes the air hotter, but the face cooler; because it keeps taking the heat out of the face, and giving it to the air.
Q. Why is broth cooled by blowing it?