THE 



PHYSICAL REVIEW 



A JOURNAL OF EXPERIMENTAL AND 

 THEORETICAL PHYSICS 



CONDUCTED WITH THE CO-OPERATION OF THE 



American Physical Society 



EDWARD L. NICHOLS 

 ERNEST MERRITT, AND FREDERICK BEDELL 



Eighteenth Volume Begins JANUARY 1904 



PUBLISHED MONTHLY ANNUAL SUBSCRIPTION •5.00 



SAMPLE COPY UPON REQUEST 



THE MacMILLAN COMPANY, 



BOOKS ON SCIENCE 



Bergen's Foundations of Botany $1'50 



Davis' Physical Geography 1-25 



Moore's Laboratory Directions for Beginners in Bacteriology 1.00 



Blaisdell's Practical Physiology ^'^^ 



Brown's Physiology for the Laboratory 75 



Ward's Exercises in Meteorology ^'^^ 



Davis' Elementary Meteorology 2.50 



Williams' Elements of Chemistry 



Hastings and Beach's General Physics . . • • • • 2.75 



Wentworth and Hill's Physics 



Gage's Principles of Physics ^'^J 



Stone's E.xperimental Physics * 



Young's General Astronomy 2.75 



Byrd's Laboratory Manual in Astronomy »-25 



Upton's Star Atlas 2.00 



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