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. 16, No. 387 (Jul. 4, 1890), p. 8
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1764987
Page Count: 1