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The Joshua Lederberg Papers

Title:
Letter from Joshua Lederberg to Francis J. Ryan pdf (47,764 Bytes) transcript of pdf
Letter from Joshua Lederberg to Francis J. Ryan
Number of Image Pages:
1 (47,764 Bytes)
Date:
1949-06-13 (June 13, 1949)
Creator:
Lederberg, Joshua
Recipient:
Ryan, Francis J.
Rights:
This item is in the public domain. It may be used without permission.
Relation:
Lederberg Grouping: Correspondence B
Box Number: 8
Folder Number: 27
Unique Identifier:
BBGCPD
Accession Number:
82
Document Type:
Letters (correspondence)
Language:
English
Format:
application/pdf
image/tif
Series: Correspondence, 1935-2002
SubSeries: 1947-1953
Folder: Ryan, Francis J.
Transcript:
June 13, 1949.
Dear Francis:
Our letters must have crossed in the mails, as will our replies, no doubt, but to answer your questions:
1. Zinder has been a doing a sporadic experiment to improve the efficacy of the penicillin method, but more from the point of view of getting it to work satisfactorily with the more intractable strains of Salmonella, than to perfect it as a quantitative assay. We will be very glad to exchange information on this, as on any subject of mutual interest. Lately, he did a run incorporating .02% aside. This seems to increase the rate of killing slightly (probably by preventing penicillinase formation), but he has no information on whether the efficacy of the method was improved. Norton will be East this summer, and will no doubt see you later this month.
2. Luria told me that the Delbruck distribution had been solved by Lea and Colson, and that it probably will be published. There is also a hint of a solution applicable to this case in a mathematical paper by Everett and Ulam, PNAS, 34, 403- (1948).
Sincerely,
Metadata Last Modified Date:
2008-06-12
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