Q. If the air were hotter than our body, would the wind feel cool?
A. No; if the air were hotter than our body, it would feel insufferably hot.
Q. Why would the air feel intensely hot, if it were warmer than our blood?
A. Because then the wind would add to the heat of our body, instead of diminishing it.
Q. Is the air ever as hot as the human body?
A. Not in this country: in the hottest summer’s day, the air is always 10 or 12 degrees cooler than the human body.
Q. Is the earth a good conductor of heat?
A. No; the power of conducting heat depends upon the continuity of matter; if the particles of which a thing is composed are not continuous, they have very little power to conduct heat.
Q. Why is the earth (below the surface) warmer in winter than the surface itself?