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August 8, 1903

A RADIUM CALCULATION.

JAMA. 1903;XLI(6):376-377. doi:10.1001/jama.1903.04480030028013

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Abstract

A correspondent of the English periodical, Nature, has been calculating the amount of radium that would be required in the sun's composition to maintain its outgo of energy in the form of light and heat. Taking the most reliable figures as to the radiation of radium and of the sun, he finds that three and six-tenths grams in each cubic meter of the sun's bulk would be all that is required, excluding the possible, and, indeed, probable, conditions of the solar surface that would make even a smaller amount effective. These figures are rather startling, and aside from their general upsetting of accepted theories of the sources of solar energy, are formidable from another point of view. It is, perhaps, a fortunate thing that this new element, or whatever it is, is so scarce and hard to get. An ounce, or even a gram of radium might be an awkward

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