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Updated: May 14, 2025
In the face of these three arguments, it is a bit reckless to say the earth has existed, 1,600,000,000 years, nearly 100 times as long as proven possible by mathematical calculation. And still more reckless is the estimate of Prof. Russell, 4,000,000,000 to 8,000,000,000 years, founded on the radio-activity theory. All these wild estimates are out of the question.
The name for this element, radium, was proposed by Madame Curie, who had also suggested the term "radio-activity." The bearing of the discovery of radium and radioactivity upon theories of the atom and matter will be considered in a moment; first the more tangible qualities of this wonderful substance may be briefly referred to.
"There are other good men whom I can get, however. Van Schravendyck, of our own laboratory, is nearly as good as either Seaton or DuQuesne. He has done a lot of work on radio-activity and that sort of thing, and I think he would like to work on it." "All right. Please get it started without delay. Give him about a quarter of the solution and have the rest put in the vault.
It is then coiled on a frame and its rate of discharge measured by the electroscope. The radio-activity of the various rocks of our neighbourhood; this by direct measurement of the rock. The conductivity of the air, that is, the relative movement of ions in the air; by movement of air past charged surface.
It would seem that the existence and energy of each chosen centre, as well as its career and encounters, hang on the collateral existence of other centres of force, among which it must wend its way: yet the only witness to their presence, and the only known property of their substance, is their "radio-activity", or the physical light which they shed.
Every time he sauntered carelessly across the porch at a Summer Hotel, he gave a correct Imitation of a troop of Cavalry going over a Wooden Bridge at full Gallop. He had a way of backing into Potted Plants. Each Morning was clouded by the task of picking out a Cravat that would be of the same Radio-Activity as his Socks.
The whole matter may be summed up by saying that in this form of clairvoyant vision, there is manifested what might be called a "psychic telescope with an X-Ray attachment," thus enabling one to see at any distance, and through any intervening objects. This gives you a mental picture of the process. Radio-Activity.
The phenomena of radio-activity, and also the phenomena of the kathode rays, have obliged us to refine our machinery of minute particles by including therein particles at least a thousand times lighter than atoms of hydrogen.
These manifestations, however, are not the effect of radio-activity, but are probably the effects of short ultra-violet light waves, and are not produced spontaneously by the substances.
In this form it costs $5,000 a grain and could a pound be obtained its value would be three-and-a-half million dollars. Radium, as we understand it in any of its compounds, can communicate its property of radio-activity to other bodies. Any material when placed near radium becomes radio-active and retains such activity for a considerable time after being removed.
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