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to guarantee satisfactory luminosity. Radió thorium
is effective for one year. Polonium is effective for
140 days.
Tests conducted by customers with the material obtained
from Radium Dial and ourselves one year ago are not
comparable with results to be obtained by a test of the
two materials conducted today, because of remarkable
improvements in UNDARK during that period. Customers
must be encouraged to test our material against Luma
in reasonable production rather than by samples, which
may be specially prepared.
General discussion by salesmen of recent complaints and
suggestions by customers answered by Dr. Sochocky with
very satisfactory explanations and suggestions.
CHD: : FML
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"ocrText": "-5-\nto guarantee satisfactory luminosity. Radió thorium\nis effective for one year. Polonium is effective for\n140 days.\nTests conducted by customers with the material obtained\nfrom Radium Dial and ourselves one year ago are not\ncomparable with results to be obtained by a test of the\ntwo materials conducted today, because of remarkable\nimprovements in UNDARK during that period. Customers\nmust be encouraged to test our material against Luma\nin reasonable production rather than by samples, which\nmay be specially prepared.\nGeneral discussion by salesmen of recent complaints and\nsuggestions by customers answered by Dr. Sochocky with\nvery satisfactory explanations and suggestions.\nCHD: : FML"
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