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June 2nd,1930.
Dr. James E. Ives,
United States Public Health Service,
Room 1-123, "C" Bldg.,
16 Seventh St. S.W.
Washington, D.C.
Dear Dr. Ives:
The United States Radium Corporation and the
Radium Dial Company (Radium Luminous Corporation, Standard Chemical
Company) have supplied the American watch manufacturers with
practically all of the luminous material which they have used during
the past 15 or 16 years, so far as we know. It is possible that
small lots of material have been supplied by foreign menufacturers,
but the amount of this material used I am sure has been small.
There was a time when we used mesothorium together with
radium in the manufacture of our luminous material, and those custom-
ers to whom we sold during this period were aware of this fact.
We cannot speak for the activities of our competitors
along this line.
Very truly yours,
Vice President.
HHBarker:&H
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"ocrText": "June 2nd,1930.\nDr. James E. Ives,\nUnited States Public Health Service,\nRoom 1-123, \"C\" Bldg.,\n16 Seventh St. S.W.\nWashington, D.C.\nDear Dr. Ives:\nThe United States Radium Corporation and the\nRadium Dial Company (Radium Luminous Corporation, Standard Chemical\nCompany) have supplied the American watch manufacturers with\npractically all of the luminous material which they have used during\nthe past 15 or 16 years, so far as we know. It is possible that\nsmall lots of material have been supplied by foreign menufacturers,\nbut the amount of this material used I am sure has been small.\nThere was a time when we used mesothorium together with\nradium in the manufacture of our luminous material, and those custom-\ners to whom we sold during this period were aware of this fact.\nWe cannot speak for the activities of our competitors\nalong this line.\nVery truly yours,\nVice President.\nHHBarker:&H"
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