NovettrOcr 24, 1911 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXXXIV 



JULY to OCTOBER, 1910 



" To the solid ground 

 Of Nature trusts the mind which builds for aye." — \Vords\vorth 



M ACM I L LAN AND CO., Limited 

 NEW YORK: THE MACMILLAN COMPANY 



