Museado / NARA Collection slc — Collection slc
Recent Folios
Login Register
English (inglés) español magyar (húngaro)

Survos folio page chat

Letters Received to C.B. Lee, May 9, 1936

Ask the Scholar

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

Page image

Page 2

OCR

MASSACHUSETTS INSTITUTE OF TECHNOLOGY DEPARTMENT OF PHYSICS MAY 14,1936 CAMBRIDGE, MASS. May 13, 1936 Mr. H. H. Barker Vice President United States Radium Corporation 535 Pearl Street New York Dear Mr. Barker: Thank you for your letter of April 27th which was waiting for me when I returned from the Washington Meeting. I am very sorry that we missed each other there. The sensitive gamma ray detector which I described, is based on the quantum counter principle. It is mounted in a portable carrying case slightly smaller than an ordinary Glad- stone bag and is completely self contained, operating on 110 volts a. C. Although it has not been yet pushed to its limit of sensitivity, I believe it will probably detect 1 millimicro- gram of radium. Of course, our radon apparatus will go much further than this, having an observational limit of about 2 X 10-14 curies, but its operation is, of course, much more laborious. I hope to have the pleasure of meeting you personally in the future. Most cordially yours, Robley D. Evans RDE:R

Page data

Page
2
Source index
0
Type
document
Media ID
c354a289f0cc5d13
Size
unknown

Document data

ID
75729344
Core
doc
Type
document
DTO data 
{
    "id": "75729344",
    "sourceUrl": "https://catalog.archives.gov/id/75729344",
    "contentType": "document",
    "title": "Letters Received to C.B. Lee, May 9, 1936",
    "citationUrl": "https://catalog.archives.gov/id/75729344",
    "collections": [
        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
    ],
    "iiifBase": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "thumbnailUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "largeImageUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "imageCount": 2,
    "hasImages": true,
    "source": "import",
    "hasTranscription": false
}

Context sent to Scholar

Document identity 
{
    "localId": "75729344",
    "label": "Letters Received to C.B. Lee, May 9, 1936",
    "core": "doc",
    "dtoType": "document",
    "citationUrl": "https://catalog.archives.gov/id/75729344"
}
Document source metadata 
{
    "id": "75729344",
    "sourceUrl": "https://catalog.archives.gov/id/75729344",
    "contentType": "document",
    "title": "Letters Received to C.B. Lee, May 9, 1936",
    "citationUrl": "https://catalog.archives.gov/id/75729344",
    "collections": [
        "Safety Light Collection",
        "Records Related to Radium Dial Painters"
    ],
    "iiifBase": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "thumbnailUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "largeImageUrl": "https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/SLC/Radium/SLC_0003330.jpg",
    "imageCount": 2,
    "hasImages": true,
    "source": "import",
    "hasTranscription": false
}
Document source extras 
{
    "url": "https://catalog.archives.gov/id/75729344",
    "naId": 75729344,
    "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_0003330.pdf",
    "mediaId": "c354a289f0cc5d13",
    "ocrText": "MASSACHUSETTS INSTITUTE OF TECHNOLOGY\nDEPARTMENT OF PHYSICS\nMAY 14,1936\nCAMBRIDGE, MASS.\nMay 13, 1936\nMr. H. H. Barker\nVice President\nUnited States Radium Corporation\n535 Pearl Street\nNew York\nDear Mr. Barker:\nThank you for your letter of April 27th which was\nwaiting for me when I returned from the Washington Meeting.\nI am very sorry that we missed each other there.\nThe sensitive gamma ray detector which I described,\nis based on the quantum counter principle. It is mounted in a\nportable carrying case slightly smaller than an ordinary Glad-\nstone bag and is completely self contained, operating on 110\nvolts a. C. Although it has not been yet pushed to its limit\nof sensitivity, I believe it will probably detect 1 millimicro-\ngram of radium. Of course, our radon apparatus will go much\nfurther than this, having an observational limit of about 2\nX 10-14 curies, but its operation is, of course, much more\nlaborious.\nI hope to have the pleasure of meeting you personally\nin the future.\nMost cordially yours,\nRobley D. Evans\nRDE:R"
}