exact time and force of imagination, of memory and will, and they explore hypnotic states. Prof. E. W. Scripture has recently made certain discoveries through these interesting experiments that will prove of practical value to working

men.

More thrilling, vitally and almost dramatically interesting, however, than the work at Cambridge are the experiments of Dr. Elmer Gates at the Laboratory of Psychology and Mind-Art at Chevy Chase, Md.

Dr. Gates holds that mind activities can create brain structures. He proves his theory first by experimenting on dogs.

A certain number of puppies

born at the same time were subjected to different training, with very interesting results. A number were put in a dark room from the moment of their birth, and were not permitted to see a ray of light. Another group were allowed to live as dogs usually do. A third set were given most extraordinary training in using their seeing faculties.

age

At

the
pies were chloroformed.

of nine months all the pup-
The first

group that had never used the seeing function showed an undeveloped cortex in the seeing area of the brain. The second group that had led regular dog lives had a number of cells developed. The educated dogs, not only had a larger

number of brain cells than any of the dogs, but the cells themselves were more highly developed and more complex in their internal structure and chemical composition. Indeed, they had a greater number of brain cells than any dogs of the breed ever possessed.

Professor Gates says: "My experiments demonstrate that every definite mental experience produces a definite anatomical or molecular structure in some particular and definite part of the brain. When we see any color or hear any sound long enough to remember it, the process creates structural changes in the brain, and the refunctioning of those structures constitute memory.

The association of memories with each other is accomplished by means of interconnecting fibres and by means of wave-motions in the brain mass,-molar, electrical, and etheric." Prof. Gates holds the memory of the emotion of hate is embodied in different structures than a memory of the fear of a snake, or the memory of one's love for a mother. Every time an evil memory refunctions it becomes stronger; every time such memories are associated with other memories of the same sort a criminal dominancy is being built in the brain.

D

CHAPTER II.

THE UPBUILDING PROCESS.

OES this not hint to you that you can train yourself mentally in such a way that you not only change the cells in your brain but the conditions of your life?

The upbuilding process of mental training may seem intricate, yet it is exceedingly simple. The following on the way to give up smoking affords an insight into the philosophy of Professor Gates. He says: "I may not wish to give up the vice, for instance, of smoking. My will, therefore, wills me to smoke, and I smoke. But if I commence