Practical Mental Influence

...clearly register? In fact, the rays of light that sunburn the face and register on a photographic plate are not visible to the eye. The eye sees the lower rays, but the higher ones are detected only by instruments adapted for that purpose. Your eye cannot see an X-ray original: "X-Ray" as it passes through a room, but the photographic plate will catch it, and a photograph may be produced by its light. The rays of light visible to the eye are only the lower ones; the higher ones are far beyond the power of the eye to record. Even beyond the range of the most delicate instrument, there exist rays and waves of light with such a high vibratory rate that they defy any power to record them.

Did you ever know that there are sounds unheard by human ears that a microphone will catch and magnify? The scientific imagination dreams of instruments that will catch the songs of tiny, mite-like mite-like: extremely small, referring to mites, which are tiny arachnids insects and magnify them until they can be distinguished. There are waves of electricity that may pass through your body, unnoticed by you, and yet are powerful enough to run machinery or power electric lights. Listen to the words of certain eminent scientists:

Professor Elisha Gray Elisha Gray (1835–1901) was a famous American electrical engineer and co-founder of Western Electric; he is often remembered for his contested claim to the invention of the telephone., a celebrated scientist and teacher, has said:

“There is much food for speculation in the thought that there exist sound waves that no human ear can hear, and color waves of..."