Excerpt from Radium, October 1915, Vol. 6
In connection with this summary of the first Boston application of radium emanation therapeutics, it ought to be borne in mind that nothing has been used alongside that could in anyway influence results; neither drugs, nor in general any of those physical adjuncts such as change of air, of scene, of regimen, or of habits, that are so often pointed to as the real efficient agents in treatment at spas
One important particular distinguishes this series from previous ones, viz., the mode of exhibiting the radium (sc. radium emanation). Radium emanation may be introduced in several ways, viz., by injection, by inhalation, by bath, and in solution by drinking. But rarely, however, has it been given conjointly with its source, radium, because this yoking up has not until now been generally available.
Loewenthal in his "Grundriss" endorses this, however, as the most desirable method of exhibiting emanation, viz., a radium salt in solution, which, after sealing, has produced the emanation within its own precincts.
In such a case there is present, after a month, that amount of emanation which is in equilibrium with the radium salt (what may be called the maximum-equilibrium-constant) and there is also the radium salt as well. This last has an infinite capacity in emanation and must give off a further amount in its passage through the body.
One microgram of radium referred to (abbreviated 1 megm. = 1/1000 of a milligram) means a solution of enough of a radium salt to yield that equivalent of radium element. The amount of emanation in equilibrium with this one microgram of element is a microcurie, the measurement of which is 2,700 Mache units.
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