For the Whole Class.*
"QUICK as thought" is often taken to mean infinitely short time, or no time at all. Yet thinking is a distressingly slow process with some of us. A century and a half ago a distinguished physiologist estimated that the speed of the nerve-impulse was about 57,600,000,000 feet per second; a century later it was measured and found to be, in round numbers, 100 feet per second. It was for some time thought to have a speed comparable with the speed of the electric current, but the electric current would flash half the distance around the globe at the equator while a nerve-impulse passes from foot to head in man. The conceptions of the time of mental____________________
The experiment may be performed in one hour if proper preparations have been made and the reading of the explanatory parts is postponed until the experiments have been completed.