Q. Why do we generally feel colder out-of-doors?
A. Because the air (which surrounds us) is always changing; and as fast as one portion of air has become warmer by contact with our body, another colder portion surrounds us to absorb more heat.
Q. Why are hot foods made cool by blowing them?
A. Blowing causes the air (which covers the hot food) to change more rapidly; in consequence of which, the hot air is quickly blown away, and gives place to fresh cold air.
Q. Why do ladies fan themselves in hot weather?
A. By the action of the fan, fresh particles of air are perpetually brought in contact with the face, and every fresh particle of air absorbs some heat from the skin.
Q. Does the fan cool the air?
A. No; it makes the air hotter, by imparting to it the heat out of our face: but it cools the face blown upon, by transferring its heat to the air.
Q. Is the air in summer time ever so hot as our bodies?