You are not currently logged in.
Access JSTOR through your library or other institution:
New Series, Vol. 152, No. 3727 (Jun. 3, 1966), pp. 1414-1418
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1718182
Page Count: 5
Preview not available
Science © 1966 American Association for the Advancement of Science