. Radiography, X-ray therapeutics and radium therapy . is difficult to imagine any actiontaking place by way of the skin surface. 2. The emanation may be forced into water, and the patient begiven a stated dose of this at regular times. Here, again, a large margin of error must be allowed for, because theemanation slowly decays, so that if it is not at full strength when the water METHODS OF USING RADIUM 347 is first dispensed it will be practically valueless in less than a week ; waterimpregnated with, emanation of radium must, therefore, be given at firstonly in small quantities at stated ti
. Radiography, X-ray therapeutics and radium therapy . is difficult to imagine any actiontaking place by way of the skin surface. 2. The emanation may be forced into water, and the patient begiven a stated dose of this at regular times. Here, again, a large margin of error must be allowed for, because theemanation slowly decays, so that if it is not at full strength when the water METHODS OF USING RADIUM 347 is first dispensed it will be practically valueless in less than a week ; waterimpregnated with, emanation of radium must, therefore, be given at firstonly in small quantities at stated times, and in gradually increasingquantity in order to compensate for the gradual loss of activity, which isthe result of the decay of the emanation. The emanation is absorbed by oil, water, and other liquids in definiterelative proportions, and any of these may be used as a means of getting theemanations into the system, or it may be injected into the substance of oraround a growth. 3. The gas may be passed into glass or metal tubes, or flat gas-tight. Fig. —Apparatus for inhalation of radium emanation and oxygen. (Radium, Limited.) applicators may be made to receive the emanation under pressure. Thesemay be employed in exactly the same way as the radium tube, bearing alwaysin mind the decay curve of the emanation. Tubes containing emanationmay be inserted into a tumour mass, and left for days if desirable. 4. By using a special electrical device the emanation can be depositedupon metal points or flat surfaces of metal; these deposits retain the sameactivity as the purest radium, but the duration of the activity is much lessthan that of the emanation itself. The deposit of radioactive bodies on 348 RADIATION THERAPEUTICS flat applicators may be used in many ways, as, for instance, for ionisation,a powerful galvanic current being employed to drive them into the reports a number of cases which have received great benefit by thismethod of treatment. Of the many
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