The Archive · 1923

Simple Laws of Physics

The physical Jaws involved are the simple ones that heated air rises and that two bodies cannot occupy the same space at the same time, The hot sun beats down on the still air and overheats it. Immediately it begins to rise, leaving a partial vacuum. Cooler air from all sides moves in to fill up the depression; but air from al] sides at once cannot reach it, so a whirl of air forms round the hot area og water running out of a bathtub whirls down the pipe. In this case the air whirls up instead of down, pulling up the sea and increasing the vacuum itself. Once firmly established, this air eddy starts to roll westward, and the chief mischief is on its way. The typhoon itself travels very slowly—usually between five and ten miles an hour—but its whirling core has a speed of over 120 miles an hour. Outwitting a typhoon, he relates, is an exhausting but exciting adventure when a ship is not too close to shore and has plenty of sea room.

Text read from the printed page and cleaned; old type leaves the occasional error.

Your account