A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid ground 

 iture trusts the mind which builds for aye."— Wordsworth. 



No. 2568. Vol. 102] 



THURSDAY, JANUARY 16, 1919 



[Price Ninepence. 



K«isirr<'l as a Newspaper at the General Post Office ] 



[All Rights Reserved. 



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