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Mar. 15,1940
Dr. F. B. Flinn,
DeLamar Institute of Public Health,
600 We 168th St. New York City.
Dear Dr. Flinn:
The 15 plates we are today sending you herewith are treated with
a total of 5 milligrams radium. A preliminary measurement indicates that
the radium is tightly bound, and that a large percentage of the alpha
radiation is available. The plates were treated on March 12th, and con-
sequently will not reach their peak value for several weeks. In packing,
the plates have been placed in a container with the treated side up.
We are also enclosing a bill for $350.00 which covers in part cost
of materials used.
We trust you will find these plates satisfactory, and that they
will accomplish the work for which you intend them.
Very truly yours,
CWWallhausen;dk
Chief Chemist
enc.
th.
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"ocrText": "Mar. 15,1940\nDr. F. B. Flinn,\nDeLamar Institute of Public Health,\n600 We 168th St. New York City.\nDear Dr. Flinn:\nThe 15 plates we are today sending you herewith are treated with\na total of 5 milligrams radium. A preliminary measurement indicates that\nthe radium is tightly bound, and that a large percentage of the alpha\nradiation is available. The plates were treated on March 12th, and con-\nsequently will not reach their peak value for several weeks. In packing,\nthe plates have been placed in a container with the treated side up.\nWe are also enclosing a bill for $350.00 which covers in part cost\nof materials used.\nWe trust you will find these plates satisfactory, and that they\nwill accomplish the work for which you intend them.\nVery truly yours,\nCWWallhausen;dk\nChief Chemist\nenc.\nth."
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