HOW HE KNEW.

New Zealand Tablet, 30 May 1918, Page 45

HOW HE KNEW.

A certain country school teacher, in endeavoring to explain to his class what compressed air was, brought his bicycle into the room and leaned it up against the wall. “Now,” he remarked, “under the outer covering of that back wheel there is a hidden force. What is it ? ” *

“Injy rubber said one smart youth. “No; try again.” The boy tried again, as did nearly every member of the class, but without success. At last one of the youngsters, who had been making a close inspection of the machine, turned on the teacher with a beaming face. “I have it!” he exclaimed. “It’s windjust wind!” After commending the youngster, the teacher asked how he discovered the “hidden force.” “Why,” was the astounding reply, “I’ve just stuck my knife in to see!”