

Nature, l 



I, •9'6J 



Sipteiiibcr 2 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME XCVII 



MARCH, 1916, to AUGUST, 1916. 



" 7l» the solid ground 

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



MACMILLAN AND CO., Limited 

 NEW YORK: THE MACMILLAN COMPANY 



