IQiSj 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME CI -^ 



MARCH, 1918, to AUGUST, 1918 



" To the solid ground 

 Of Nature trusts the mind which builds for aye" — Wordsworth 



MACMILLAN AND CO., Limited 

 NEW YORK: THE MACMILLAN COMPANY 



