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the entire bony skeleton. Its quantitative estimation
was carried out by making (a) gamma ray neasurements on the subjects
by means of a standardized electroscope, and (b) adding to the
value thus obtained, the quantity of radium responsible for the
padium emanation, (radon) found present in the air expired by the
sub jects. (1) The quantity of radium romoved day by day is re-
presented practically entirely by the radium present in the excreta,
about 90 per cent being found in the spoces. Quantitative deter-
minations of radium were made on the daily excreta collected for a
period of a week.
As early as 1915 Seil Viol, and Camoron conducted some
experiments on the elimination of radium by living persons in the
fleces and urine. In the case of intravenous injection, ----100
miorograms radium element as chloride, --- the excreta were assayed
for radium over poriods of 10 days to 3 weeks immediately following.
When 50 micrograms were taken by mouth, the radium determinations
were terminated with the sixth day following. Taken by mouth a
muoh groater part of a soluble radium salt was found to be eliminated
during the first 3 or 4 days than when introduced intraveaously, but
after that the rate of elimination was sensibly the same. These
investigators found that the main part of the radium was eliminated
in the foces. They report that 25 to 35 por cont of the radium
takon by mouth remains in the body four to five days after ingestion.
By the 10th day after taking the radium the daily rate of elimination
is less than 1 por cent. This results in an exceedingly slow
elimination of the radium remaining, and the authors infer that
the process goes on for months. The first rapid elimination of
(1)
For details and theory see Schlundt, Barker, Flinn, Jour. . Roentgen
ology and Radium Therapy, Vol. 21, pp. 345-54 (1929).
(2)
The Olimination of Soluble radium salts taken intravenously and
per Os, Radium, 5, 40, (1915). Also published in New York
Medical Journal, May lst, 1915.
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"ocrText": "2.\nthe entire bony skeleton. Its quantitative estimation\nwas carried out by making (a) gamma ray neasurements on the subjects\nby means of a standardized electroscope, and (b) adding to the\nvalue thus obtained, the quantity of radium responsible for the\npadium emanation, (radon) found present in the air expired by the\nsub jects. (1) The quantity of radium romoved day by day is re-\npresented practically entirely by the radium present in the excreta,\nabout 90 per cent being found in the spoces. Quantitative deter-\nminations of radium were made on the daily excreta collected for a\nperiod of a week.\nAs early as 1915 Seil Viol, and Camoron conducted some\nexperiments on the elimination of radium by living persons in the\nfleces and urine. In the case of intravenous injection, ----100\nmiorograms radium element as chloride, --- the excreta were assayed\nfor radium over poriods of 10 days to 3 weeks immediately following.\nWhen 50 micrograms were taken by mouth, the radium determinations\nwere terminated with the sixth day following. Taken by mouth a\nmuoh groater part of a soluble radium salt was found to be eliminated\nduring the first 3 or 4 days than when introduced intraveaously, but\nafter that the rate of elimination was sensibly the same. These\ninvestigators found that the main part of the radium was eliminated\nin the foces. They report that 25 to 35 por cont of the radium\ntakon by mouth remains in the body four to five days after ingestion.\nBy the 10th day after taking the radium the daily rate of elimination\nis less than 1 por cent. This results in an exceedingly slow\nelimination of the radium remaining, and the authors infer that\nthe process goes on for months. The first rapid elimination of\n(1)\nFor details and theory see Schlundt, Barker, Flinn, Jour. . Roentgen\nology and Radium Therapy, Vol. 21, pp. 345-54 (1929).\n(2)\nThe Olimination of Soluble radium salts taken intravenously and\nper Os, Radium, 5, 40, (1915). Also published in New York\nMedical Journal, May lst, 1915."
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