D.cember 13, 1900 



Nature 



A WEEKLY 



I 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXII 



MAY to OCTOBER 1900 





" To the solid ground 

 Of Nature trusts the mind 7vhich builds for aj^."— Wordsworth 



MACMILLAN AND CO., Limited 

 NEW YORK : THE MACMILLAN COMPANY 



