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Published every Friday by 



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American Historical 

 Review 



Vol. X, No. 8 JANUARY, 1905 



The Policy of France toward the Mississippi Valley in 

 the Period of Washington and Adams. Frederick 

 Jackson Turner. 



Improvising a Government in Paris in July, 1789. 



Henry E. Bourne. 



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



Materials in British Archives for American Colonial 

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The Physical Review. 



A JOURNAL OF EXPERIMENTAL AND 

 THEORETICAL PHYSICS 

 Conducted with the Cooperation of THE AMERICAN 

 PHYSICAL SOCIETY BY 



Edward L. Nichols, Ernest Merritt, and Frederick Bedell 

 CVII. February, 1905. 



TABLE OF CONTENTS. 



On the Differential Transformer. A. Trowbridge. 



Heat of Vaporization of Liquid Air. 



R. C. Fenner and F. K. Richtmver. 

 The CoetKi-ient of Kxpunsion of Nickel at its Critical 

 Temperature. H. M. Randall. 



The Velocity of Suund. ThOS. C. Hebb. 



The Arc In a Magnetic Field. C. U. CHILD. 



Apparatu- to Illustrate Pressure of Sound Waves. 



R W. Wood. 



American Physical Society. Minutes of the twenty- 

 sixth meeting. 



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