SCIENCE.- ADVERTISEMENTS. 



V 



Modern Theory of 

 Physical Phenomena 



RADIO-ACTIVITY, 

 IONS, ELECTRONS 



By AUGUSTO RIGHI 



Professor of Physics in the University of Bologna. 



Authorized Translation by 



AUGUSTUS TROWBRIDGE 



Professor of 3Iathematical Physics in 

 the Unii'ei-sity of Wisconsin . 



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Published every Friday by 



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American Historical 

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Vol. X, No. 1 OCTOBER, 1904 



The University of Paris in the Sermons of the Thirteenth 



Century. Charies H. Haskins. 

 English Poetry and English History. Goldwin Smith. 

 The Naming of America. Edward G. Bourne. 

 Nova Scotia and New England during the Revolution. 



Emily P. Weaver. 

 The First Stage of the Movement for the Annexation of 



Texas. Georqe P. G«rhison. 

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The Physical Review. 



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CV. December, 1904. 



TABLB OF CONTENTS. 



The Electrical Conductivity of very Dilate Hyelro- 

 clilori)' an<l Nitric Acid SoIumohk. 



H. M. Goodwin and R. Haskell 

 Tlie Kistribution of TemperHtiire in an Air Liquefier 

 of lh« Single-circuit type. 



W. P. Bradley and C. F. Hale 

 The Influence of I-ight ui>on t'le Absorption and K'lec- 

 tri<'al Conductivity of Fluorescent -nlutions. 



E. L. Nichols and Ernest Merritt 

 Ka<liati<in Pyroinetry. 



C. W. Waidxer and C. K. Burgess 

 A Limitation in tlie Use|oi the Wanuer Pyrometer. 



L. W. Hartman 



American Physical "Society, ^pectrophotouietric ^tudy 

 of Solution of l opper and Cobalt. H. E. MoORE 



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