Nature, "I 

 June 13, 1901J 



Nat u re 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXIII 



NOVEMBER 1900 to APRIL 1901 



" To the solid ground 

 0/ Nature trusts the mind ivhich builds for aye." — Wordsworth 



'§anl\on 



MACMILLAN AND CO., Limited 

 NEW YORK: THE MACMILLAN COMPANY 



