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American Historical 

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Vol. X, No. 2 JANUARY, 1905 



The Policy of France toward the Mississippi Valley in 

 the Period of Washington and Adams. Frederick 

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Improvising a Government in Paris in July, 1789. 



Henry E. Bourne. 



The Treaty of a Guadalupe-Hidalgo. Jesse S. Reeves. 



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The Physical Review. 



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TABLE OP CONTENTS. 

 On the Differential Transformer. A. Trowbridge. 



Heat of Vaporization of Liquid Air. 



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

 Tlie Coefficient of Kxp tnsion of Nickel at its Critical 

 Temperature. H. M. Randall. 



The Velocity of Sound. Thos. C. Hebb. 



The Arc In a Magnetic Field. C. 1). CHILD. 



Apparatui to Illustrate Pressure of Sound Waves. 



R W. Wood. 



American Physical Society. Minutes of the twenty- 

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