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The Joshua Lederberg Papers

Title:
Letter from Joshua Lederberg to Ray Hefferlin pdf (46,391 Bytes) transcript of pdf
Letter from Joshua Lederberg to Ray Hefferlin
Description:
Item is handwritten. Item is a photocopy.
Number of Image Pages:
1 (46,391 Bytes)
Date:
1986-04-14 (April 14, 1986)
Creator:
Lederberg, Joshua
Recipient:
Hefferlin, Ray
Rights:
This item is in the public domain. It may be used without permission.
Relation:
Lederberg Grouping: No Epoch
Box Number: 57
Folder Number: 27
Unique Identifier:
BBGGTW
Accession Number:
49
Document Type:
Letters (correspondence)
Language:
English
Format:
application/pdf
image/tif
Physical Condition:
Good
Series: Research
SubSeries: Computer Science
SubSubSeries: DENDRAL (Dendritic Algorithm)
SubSubSubSeries: Systems Architecture (Design, Theory, and Development)
SubSubSubSubSeries: Chronological Correspondence
Folder: 1982-1988
Transcript:
Professor Hefferlin
[stamped, APR 14 1986]
You can easily calculate the number of hydrogens with the formula.
nH equals (2 plus 2nC plus nN) minus 2U
nC, nN and U are given in the tables. nO does not affect nH.
All this follows from valence rules. In saturated molecules, adding "C" is equivalent to adding [diagram]; N to [diagram]. I doubt if the original printouts are extant.
JL
X . . . 4/14/86
(["delta" symbol] if R. Platt)
et al.
Metadata Last Modified Date:
2007-01-18
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