May 20, 1892.] 



SCIENCE. 



293 



side of the historic creeds. ' It is entirely distinct in theory and 

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— P. Blakiston, Son, & Co., Philadelphia, announce " Materia 

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— The ninth volume of the new edition of " Chambers's Ency- 

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NEO-DARWINISM AND EO-LAMARCKISE 



By LESTER F. WARD. 



Annual address of the President of the Biologies 

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 of acquired characters. 



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