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:
J. W. Chickering, Jr. and L. N. Johnson
Vol. 12, No. 290 (Aug. 24, 1888), p. 96
Published by: American Association for the Advancement of Science
Stable URL: http://www.jstor.org/stable/1763678
Page Count: 1