Museado / NARA Collection slc — Collection slc
Recent Folios
Login Register
English español (Spanish) magyar (Hungarian) हिन्दी (Hindi)

Survos folio page chat

Letters Received to H.H. Barker, October 5, 1928

Ask the Scholar

Page 2 of 2
I can add historical knowledge about this page.

Page image

Page 2

OCR

university OF MISSOURI COLUMBIA RECEIVE OCT 8 DEPARTMENT OF CHEMISTRY October 5, 1928 WE Mr. H. H. Barker, 535 Pearl Street, RADIO United States Radium Corporation, New York, N. Y. Main. My dear Barker: We have not yet shipped you the spinthar- iscopes and the reason for our delay is the fact that our screens all appear to be somewhat radioactive. We have had several of them made by different persons but all from the same stock sample of zinc sulfide. We believed up to this time that this sample was practically free from radioactive substances because we had tested it with the high power microscopes and found only occasion- al scintillations, but now when the area of the field is greatly increased we find scintillations to be too numerous for compara- tive counting when the number of scintillations to be counted is rather small. We shall, however, send on one of these instruments and in the meantime we shall try to secure samples of luminous zinc sulfide from other sources and we hope that we may acciden- tally get hold of a sample which is free from this residual acti- vity. I wish to thank you for your suggestions on the section of the report which has gome out to you. That is just exactly the kind of criticism we welcome and I hope that Dr. Flinn will make equally constructive suggestions. I am now pre- paring the theoretical part of our report. Sincerely yours Herman Schlundt Herman Schlundt. HS C b

Page data

Page
2
Source index
0
Type
document
Media ID
501ce1b379d8e261
Size
unknown

Document data

ID
75723207
Core
doc
Type
document
DTO data 
{
    "id": "75723207",
    "sourceUrl": "https://catalog.archives.gov/id/75723207",
    "contentType": "document",
    "title": "Letters Received to H.H. Barker, October 5, 1928",
    "citationUrl": "https://catalog.archives.gov/id/75723207",
    "collections": [
        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
    ],
    "iiifBase": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "thumbnailUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "largeImageUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "imageCount": 2,
    "hasImages": true,
    "source": "import",
    "hasTranscription": false
}

Context sent to Scholar

Document identity 
{
    "localId": "75723207",
    "label": "Letters Received to H.H. Barker, October 5, 1928",
    "core": "doc",
    "dtoType": "document",
    "citationUrl": "https://catalog.archives.gov/id/75723207"
}
Document source metadata 
{
    "id": "75723207",
    "sourceUrl": "https://catalog.archives.gov/id/75723207",
    "contentType": "document",
    "title": "Letters Received to H.H. Barker, October 5, 1928",
    "citationUrl": "https://catalog.archives.gov/id/75723207",
    "collections": [
        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
    ],
    "iiifBase": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "thumbnailUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "largeImageUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.jpg",
    "imageCount": 2,
    "hasImages": true,
    "source": "import",
    "hasTranscription": false
}
Document source extras 
{
    "url": "https://catalog.archives.gov/id/75723207",
    "naId": 75723207,
    "levelOfDescription": "fileUnit",
    "recordType": "description",
    "ocrSource": "nara-archive"
}
Page context 
{
    "seq": 2,
    "pageIndex": 0,
    "type": "document",
    "url": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0001465.pdf",
    "mediaId": "501ce1b379d8e261",
    "ocrText": "university OF MISSOURI\nCOLUMBIA\nRECEIVE\nOCT 8\nDEPARTMENT OF CHEMISTRY\nOctober 5, 1928\nWE\nMr. H. H. Barker,\n535 Pearl Street,\nRADIO\nUnited States Radium Corporation,\nNew York, N. Y.\nMain.\nMy dear Barker:\nWe have not yet shipped you the spinthar-\niscopes and the reason for our delay is the fact that our screens\nall appear to be somewhat radioactive. We have had several of\nthem made by different persons but all from the same stock sample\nof zinc sulfide. We believed up to this time that this sample\nwas practically free from radioactive substances because we had\ntested it with the high power microscopes and found only occasion-\nal scintillations, but now when the area of the field is greatly\nincreased we find scintillations to be too numerous for compara-\ntive counting when the number of scintillations to be counted is\nrather small. We shall, however, send on one of these instruments\nand in the meantime we shall try to secure samples of luminous\nzinc sulfide from other sources and we hope that we may acciden-\ntally get hold of a sample which is free from this residual acti-\nvity.\nI wish to thank you for your suggestions\non the section of the report which has gome out to you. That is\njust exactly the kind of criticism we welcome and I hope that Dr.\nFlinn will make equally constructive suggestions. I am now pre-\nparing the theoretical part of our report.\nSincerely yours\nHerman Schlundt\nHerman Schlundt.\nHS\nC\nb"
}