Nature^ ~| 

 «.-ii,i9oSj 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXXVII 



NOVEMBER, 1907, to APRIL, ic 



" To the solid ground 

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



MACMILLAN AND CO., Limited 



NEW YORK: THE MACMILLAN COMPANY 



