July i, 1892.] 



SCIENCE. 



13 



— The Open Court Publishing Co., Chicago, has just ready a 

 second edition, revised and enlarged, of Gen. M. Trumbull's 

 timely book on the tariff question, " The Free-Trade Struggle in 

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— Charles L. Webster & Co. announce that they will issue in 

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— \n LippincotV s Magazine for July " Peary's North Green- 

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— Charles H. Sergei & Co., Chicago, have just issued in their 

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