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American Historical 

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Vol. X, No. 3 APRIL,, 190 5 



The Meeting of the American Historical Association at 

 Chicago. 



The Treatment of History. Goldwin Smith. 



Methods of Work in Historical Seminaries. George 



Burton Adams. 

 The Early Life of Oliver Ellsworth. William Garrot 



Brown. 



Origin of the Title Superintendent of Finance. Henry 



Barrett Learned. 

 Documents — Documents on the Blount Conspiracy, 



1795-1707. . 

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The Physical Review. 



A JOURNAL OF EXPERIMENTAL AND 

 THEORETICAL PHVSICS 

 Conducted with the Cooperation of THE AMERICAN 

 PHYSICAL SOCIETY BY 



Edward L. Nichols, Ernest Merritt, and Frederick Bedell 

 CVII. February, 1905. 



TABLE OP CONTENTS. 



On the Differential Transformer. A. Trowbridge. 



Heat of Vaporization of Liquid Atr. 



R. C. Fenner and F. K. Richtmyer. 

 The Coefficient of Kxpansion of Nickel at its Critical 

 Tenoperature. H. M. Randall. 



The Velocity of Sound. Thos. C. Hebb. 



The Arc in a Magnetic Field. C. D. Child. 



Apparatus to Illustrate Pressure of Sound Waves. 



R. W. Wood. 



American Physical Society. Minutes of the twenty- 

 sixth meeting. 



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