SCIENCE. -AD VERTISEMENTS. 



V 



From Kindergarten to College 



IS THE SCOPE OF 



AMERICAN EDUCATION 



A Monthly Magazine for Teachers, Principals 

 and Superintendeuts 



Annual Subscription $1.00 Single Copies 10 Cents 



A FEW FEATURES 



Articles on Practical School Subjects by 

 the Foremost Educators 



Excerpts of the Best to be Found in Cur- 

 rent Educational Journals 



Practical Methods and Suggestions for 

 the School room 



Summary of Important Educational News 



" The English Letter Box " conducted by 

 Charles Davidson, Ph.D. 



F Any reader of this advertisement can secure F 



R American Education free for six months by R 



E remitting One Dollar to pay for one new E 



E subscription. E 



AMERICAN EDUCATION 



81 Chapel Street, Albany, New York 



SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE AD- 

 VANCE3IENT OF SCIENCE, PUBLISHING 

 THE OFFICIAL NOTICES AND PROCEED- 

 INGS OF THE AMERICAN ASSOCIATION 

 FOR THE ADVANCEMENT OF SCIENCE. 



Entered in the post-office at Lancaster, Pa., as second- 

 class matter. 



TERMS OF SUBSCRIPTION . 



Five dollars annually in advance : single copies 15 

 cents. Subscriptions and advertisements should be 

 sent to Science, 41 North Queen Street, Lancaster, Pa., 

 or 66 Fifth Avenue, New York. 



Science is sent free of charge to members of the 

 American Association for the Advancement of Science 

 except to members residing in foreign countries to whom 

 a charge of $1.04 per annum for postage is made. In 

 formation in regard to the conditions of membership 

 may be obtained from the permanent secretary. Dr. 

 L. 0. Hcward, Cosmos Club, Washington, D. C. 



Published every Friday by 



the macmillan company 



The 



American Historical 

 Review 



Vol. X, No. 2 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 

 History. Charles M. Andrews. 



Documents. 



Reviews of Books. 



Commimications. 



Notes and News. 



ISSUED QUARTERLY SINGLE NUMBERS, $1.00 

 ANNUAL SUBSCRIPTION, $4.00 

 VOLUMES I., XL, III., IV., V., VI., VII, and 

 VIII. BOUND IN HALF MOROCCO, $4.50 EACH. 



NEW YORK 

 THE MACMILLAN COMPANY 

 London: Macmillan & Co., Ltd. 



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 

 CVH. February, 1905. 



TABLE OP CONTEMTS. 



On the Differential Transformer. A. Trowbridge. 



Heat of Vaporization of Liquid Air. 



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

 The Coefficient of b^xpaiision of Nickel at its Critical 

 Temperature. H. M. Randall. 



The Velocity of Sound. Thos. C. Hebb. 



Tlic 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. 



Annual Subscription, $i.OO. Single Numbers, 50c 

 Double Numbers, 75c. 



PUBLISHED FOR CORNELL UNIVERSITY 



THE MACMILLAN COMPANY, 66 Fiftb Ave., N. Y. 



