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Letters Received to H.H. Barker, April 15, 1929

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UNIVERSITY OF MISSOURI COLUMBIA DEPARTMENT OF CHEMISTRY 2/Barker Therefore no radon detected. The same method employed with Mrs. Dunschott residues showed an increase of 0.02 to 0.03 div/sec. Insoluble residues, tested by film method were found to be inactive Two residues obtained by evaporation of nitric acid solution when tested by film method were found distinctly active, the observed drift 1.5 to 2 times as great as nat. drift. How interpret these anomalous results? 1. Radium present (?) may have deposited on walls of flasks during storage period in non-emanating form. Conditions not favorable for this to happen. 2. Film activity observed due to polonium and RaD eliminated in feces. Radium not eliminated. Excreta residues, Mrs. Hussman still await examination. These were found less active by film method than Freyer samples. Have enough reserve Freyer residues to make another detr. for Radium by fusion method of separating emanation. Had a note from Failla last week inquiring about progress on above work. Perhaps you will be good enough to call him up and report the "fix" we are in on these radium determinations. Have you any suggestions? Send them on by fast mail. How is the world going? What progress, if any, has been made on calibrating gamma ray electrosconer and emanation electroscopes? Very truly yours, Herman Schlendt Herman Schlundt HS:RO

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Source index
0
Type
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Media ID
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Size
unknown

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Context sent to Scholar

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    "ocrText": "UNIVERSITY OF MISSOURI\nCOLUMBIA\nDEPARTMENT OF CHEMISTRY\n2/Barker\nTherefore no radon detected. The same method employed with Mrs. Dunschott\nresidues showed an increase of 0.02 to 0.03 div/sec.\nInsoluble residues, tested by film method were found to be inactive\nTwo residues obtained by evaporation of nitric acid solution when tested by\nfilm method were found distinctly active, the observed drift 1.5 to 2 times as great\nas nat. drift.\nHow interpret these anomalous results?\n1. Radium present (?) may have deposited on walls of flasks during storage\nperiod in non-emanating form. Conditions not favorable for this to happen.\n2. Film activity observed due to polonium and RaD eliminated in feces. Radium\nnot eliminated.\nExcreta residues, Mrs. Hussman still await examination. These were found less\nactive by film method than Freyer samples.\nHave enough reserve Freyer residues to make another detr. for Radium by fusion\nmethod of separating emanation.\nHad a note from Failla last week inquiring about progress on above work. Perhaps\nyou will be good enough to call him up and report the \"fix\" we are in on these radium\ndeterminations.\nHave you any suggestions? Send them on by fast mail. How is the world going?\nWhat progress, if any, has been made on calibrating gamma ray electrosconer and\nemanation electroscopes?\nVery truly yours,\nHerman Schlendt\nHerman Schlundt\nHS:RO"
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