yaiure, 

 July 28, 1910 . 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUxME LXXXIII 



MARCH to JUNE, igio 



" To the solid ground 

 OJ Nature trusts the ?nind which builds for aye." — Wordsworth 



MACMILLAN AND CO., Limited 

 NEW YORK: THE MACMILLAN COMPANY 



