TRYING TO SEE THE WIND.
Did you ever try to see the wind? It is a very pretty experiment, and one easily performed. In the first place choose a windy day, then secure a polished piece of metal. (A hand-saw will be the easiest to get.) Hold the metallic surface at right angles to the direction of the wind. For example, if the wind is in the north, hold the saw east and west inclined about forty-five degrees to the horizon. Now look carefully at the sharp edge, and you will shortly see the wind pouring over it like a waterfall. Do not try the experiment on a rainy or a murky day.
