What do they expect to come out of it?
The notion of a mental laboratory is still a mystery to most persons. They ask themselves the above questions, and many feel as they do so an uncanny shiver. They cannot realize that the study of the mind is already an established natural science, here, at sober Harvard, in all the leading universities, and free of spooks and mediums.
Yet a psychological laboratory looks much like any other modern laboratory. Around the rooms run glass-cases filled with fine instruments. Shelves line up, row after row, of specimen-jars and bottles. Charts cover the remainder of the walls. The tables and floors are crowded with working apparatus. Two large rooms and one small one are now occupied at Harvard. Four more rooms will be added to these this summer.
Also, the spirit that reigns in these rooms is the same that is found in other laboratories of exact science. This is the important thing. The minds of these workers are not wandering in dialectics and vagrant hypotheses. Reverence has opened her eyes. Hypotheses they have, and must have. Often they hold conflicting opinions. But the referee is always present—Nature herself. To experiment, to show the 400 fact, is always the method of debate. This is the great advantage of the modern way of studying psychology over the old.
The American public is so practical that I feel I can alone satisfy its “whats and wherefores” by explicitly describing some of the investigations being carried on here.
EFFECT OF ELEMENTARY SENSATIONS ON ONE ANOTHER.
Here is a lantern throwing a steady light through a large tube. (See illustration below, the right hand group.) By transparent slides of colored glass or gelatine, the light may be made of any color. At the end of the tube is a box, like a camera. The operator covers his head with a cloth, and observes the color of the light as it shines from the tube through, or on, a tiny hole in the dark box. The size of the hole can be varied by moving slides, worked by micrometer screws so fine that they measure the dimensions of the hole to the four-hundredth of an inch.
STUDYING THE EFFECTS OF SOUND AND OF ATTENTION ON COLORS.