Scientific "discoveries" are largely made by the trial and error system. The scientist takes what he finds. Generally he does not know, at first, what it means. Martell took his oscillating current and "discovered" the Martel Magnetic Levitation, whereby gravity was lessened, and then completely nullified. Grenfell, with his de-electroniration, increased the power of gravity. The two were combined by Grenfell and his associates--and the secret of interplanetary flight was at hand. But there was a host of other workers not interested in space flyers; they probed in other directions. It was found that the subnormal magnetic field surrounding a metallic substance in a state of de-electroniration had two unusual properties: its color absorption was high; and it bent light rays from their normal straight path into a curve abnormally great. Yet, though it absorbed the color of the rays emanating from the de-electronired metal (the metal itself increasing this result), the magnetic field, while bending the rays passing through it from distant objects behind it, nevertheless left their color and all their inherent properties unchanged. The principles of color absorption are these:--a pigment--a paint, a dye, if you will--is "red" because it absorbs from the light rays of the sun all the other colors and leaves only red to be reflected from it to the eye. Or "violet" because all the rest are absorbed, and the violet is reflected. Or "black" because all are absorbed; and "white" the reverse, all blended and reflected. Color is dependent upon vibratory motion. The solar spectrum--its range of visibility through the primary colors from red to violet--can be likened to a range of radio wave-lengths; vibration frequencies; and when we eliminate them all save the "violet"--that is what we have left, in the radio to hear, in color absorption to see. Thus, a de-electronired metal was found to produce black. Not black as habitually we meet it--a "shiny" black, a "dull" black; but a true black--a real absence of light-ray reflection--a "nothingness to see"; in effect, an invisibility. A word of explanation is necessary regarding the other property of the de-electronired field--the bending of distant light rays into a curve, yet leaving their spectrum unchanged. It was Albert Einstein who first made the statement--in the years following the turn of the century at 1900--that it was a normal, natural thing for a ray of light to be slightly deflected from its straight path when passing through a magnetic field. The claim caused world-wide interest, for upon its truth or falsity the whole fabric of the Einstein Theory of Relativity was woven.