12-1 \ 2z. 



NATURE 



A WEEKLY 



ILLUSTRATED JOURNAL OF SCIENCE 



VOLUME XXIV. 



MAY 1881 to OCTOBER 1881 



" To the solid i^jvund 

 Ot Nature trusts the mind ichich builds /or aye." — Wordsworth 



|.'ont)Dn anb |lctu §orh: 



M A C M I L L A N AND CO. 



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