A. Because (in windy weather) the particles of air pass over us more rapidly; and every fresh particle takes from us some portion of heat.
Q. Show the wisdom of God in making the air a bad conductor.
A. If air were a good conductor (like iron and stone) the heat would be drawn so rapidly from our body, that we must be chilled to death. Similar evils would be felt also by all the animal and vegetable world.
Q. Does not the bad conducting power of air enable persons to judge whether an egg be new or stale?
A. Yes; touch your tongue against the shell at the larger end; if it feels warm to the tongue, the egg is stale; if not, it is new-laid.
Q. Why will the shell of a stale egg feel warm to the tongue?
A. Between the shell and the “white of the egg” there is a small quantity of air, which expands in a stale egg, from the shrinking of the white.
Q. Why does the expansion of air (at the end of an egg) make it feel warm to the tongue?
A. As air is a very bad conductor, the more air an egg contains, the less heat will be drawn from the tongue when it touches the shell.