Nature 



x 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



V 7H 



VOLUME XLiI 



NOVEMBER 1889 to APRIL 1890 



C 





^Si 



** To the solid ground 

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



yonbon anb g^to gork 



MACMILLAN AND CO. 



1890 



