Nature, 1 



December 12, Tgo7j 



Nature 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME LXXVT 



MAY to OCTOBER, 1907 



" To the solid ground 

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



MACMILLAN AND CO., Limited 



NEW YORK: THE MACMILLAN COMPANY a,0\8"1^ 



