Your PDF has successfully downloaded.
You may be interested in finding more content on these topics:
You are not currently logged in.
Access JSTOR through your library or other institution:
Vol. 2, No. 32 (Feb. 5, 1881), pp. iii-iv
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/2900380
Page Count: 2