"7' 1 



■ S, 1901 J 



Nature 



> 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXX 



MAY to OCTOBER 1904 



" To the solid ground 

 Of Nature trusts the mind which builds for are." — Wordsworth 



i^OVS^ 



M ACM I L LAN AND CO., Limited, 

 NEW YORK.: THE MACMILLAN COMPANY 



