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UNIVERSITY OF MISSOURI
COLUMBIA
DEPARTMENT OF CHEMISTRY
November 23, 1931.
NOV 25 1931
Mr. H. H. Barker
United States Radium Corporation
535 Pearl Street
New York City
My dear Barker:
In glancing at the last letter received
before the present installment of four which came to
hand this morning, I find that I have allowed consid-
erable time to elapse since writing you last. In ac-
cordance with your request we are sending under separ-
ate cover three or four copies of our paper on "Dangers
in Refining Radicactive Substances".
We are certainly interested in the pro-
posed experiments on the determination of radioacti-
vity of subjects in the Elgin Hospital. I may say
that immediately upon receiving your first letter on
this topic I set Mr. Paul Morris at work to extend
his methods of testing for radioactivity ir living
persons. He is now perfecting a method of determin-
ing quantitatively the radium emanation in expired air
by condensing the emanation in liquid air on the
one hand and on the other in absorbing the emanation
in activated charcoal. In other words, we are elabor-
ating the tests for radicactivity in living persons
and we hope that in time all this technique may serve
in such problems as the one which we will have at Elgin.
I have been unusually occupied this fall
and thus have been unable to suggest any date at which
we could undertake such measuroments. The Christmas
Holidays are probably not very desirable dates, but
that will likely be about the only tine I shall have
free.
Now, with regard to the progress on the
refining of radium, I shall defer that for this moment
until I have had a good talk not only with Breckenridge
but also with Carroll. I asked about the progress the
other day and they informed me that one of the shipments
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"ocrText": "UNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\nNovember 23, 1931.\nNOV 25 1931\nMr. H. H. Barker\nUnited States Radium Corporation\n535 Pearl Street\nNew York City\nMy dear Barker:\nIn glancing at the last letter received\nbefore the present installment of four which came to\nhand this morning, I find that I have allowed consid-\nerable time to elapse since writing you last. In ac-\ncordance with your request we are sending under separ-\nate cover three or four copies of our paper on \"Dangers\nin Refining Radicactive Substances\".\nWe are certainly interested in the pro-\nposed experiments on the determination of radioacti-\nvity of subjects in the Elgin Hospital. I may say\nthat immediately upon receiving your first letter on\nthis topic I set Mr. Paul Morris at work to extend\nhis methods of testing for radioactivity ir living\npersons. He is now perfecting a method of determin-\ning quantitatively the radium emanation in expired air\nby condensing the emanation in liquid air on the\none hand and on the other in absorbing the emanation\nin activated charcoal. In other words, we are elabor-\nating the tests for radicactivity in living persons\nand we hope that in time all this technique may serve\nin such problems as the one which we will have at Elgin.\nI have been unusually occupied this fall\nand thus have been unable to suggest any date at which\nwe could undertake such measuroments. The Christmas\nHolidays are probably not very desirable dates, but\nthat will likely be about the only tine I shall have\nfree.\nNow, with regard to the progress on the\nrefining of radium, I shall defer that for this moment\nuntil I have had a good talk not only with Breckenridge\nbut also with Carroll. I asked about the progress the\nother day and they informed me that one of the shipments"
}