An official website of the United States government
Here's how you know
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with,
the contents by NLM or the National Institutes of Health.
Learn more:
PMC Disclaimer
|
PMC Copyright Notice
1MALLINCKRODT CHEMICAL LABORATORY, HARVARD UNIVERSITY, CAMBRIDGE, MASSACHUSETTS
†
Senior Postdoctoral Fellow, National Science Foundation, spring, 1957, Geneva, Switzerland.
*
The research reported in this paper was made possible in part by support extended Harvard University by the Office of Naval Research under Contract Nonr 1866(14) and by a grant from the California Research Corporation.