If you need an accessible version of this item please contact JSTOR User Support
Proceedings of the Royal Society of London
Vol. 20 (1871 - 1872), pp. 394-402
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/113160
Page Count: 9
You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution: