TEN -VOLUME INDEX, XI-XX. 



Ready early in January. 



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CONTENTS 



Page 



Art. I. — The Heating Effects produced by Rontgen Rays in 

 Different Metals, and their Relation to the Question of 

 Changes in the Atom ; by H. A. Bumstead . 1 



II. — On a Method of Determining the Specific Gravity of 

 Soluble Salts by Displacement in their own Mother- 

 liquor; and its Application in the case of the Alkaline 

 Halides ; by J. Y. Buchanan 25 



III. — Further Work on the Interaction of Hydrochloric Acid 

 and Potassium Permanganate in the Presence of Various 

 Inorganic Salts ; by James Brown 41 



IV. — Some Western Klamath Stratigraphy ; by Oscar H. 



Hershe y . 58 



V. — A Study in the Metamorphic Rocks of the St. Francis 



Valley, Quebec; by John A. Dresser . . 67 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — The Hydrides of the Alkaline Metals, Moissan, 77. — 

 The Boiling-points of the Alkaline Metals, Euff and Johannsen ; The 

 Busting of Iron, Dunstan, Jowett and Goulding : The Cause of Color in 

 the Iron-Cyanogen Compounds, Hofmann and Resenscheck, 78. — Re- 

 searches on the Affinities and on the Causes of the Chemical Similarity or 

 Dissimilarity of Elements and Compounds, Geoffrey Martin : Vernus- 

 sigtes Ammoniak als Losnngsmittel, J. Bronn, 79. — Animal Reports of the 

 Progress of Chemistry for 1904 : A New Kind of X-Ray, W. Seitz : Mag- 

 netizing by Rapidly Oscillating Currents, Madelung : Influence of the 

 Earth in Wireless Telegraphy, J. S. Sachs, 80. — Elektrische Kraftuber- 

 tragung, Wilhelm Philippi, 81. 



Geology and Natural History. — United States Geological Survey, 81.— 

 Geology of the Central Copper River Region, Alaska, Walter C. Men- 

 dekhall, 82. — Geology of the Tonopah Mining District, Nevada, Josiah 

 Edward Spurr, 83. — The Lead, Zinc and Fluorspar Deposits of Western 

 Kentucky, E. 0. Ulrich and W. S. Tangier Smith, 84.— Die chemische 

 Beschaffenheit von Eruptivgesteinen Finnlands und der Halbinsel Kola im 

 Lichte des neuen amerikanischen Systemes, V. Hackman : Preliminary 

 Announcement Concerning a New Mercury Mineral from Terlingua, Texas, 

 W. F. Hillebrand, 85. — The Rodeo Meteorite, Farrington : The Shel- 

 burne Meteorite, L. H. Borgstr6m, 86. — Bulletins of the New York State 

 Museum : Bibliographical Index of North American Fungi, William G. 

 Farlow, 87. — The Oyster, a Popular Summary of a Scientific Study, 

 William K. Brooks, 88. 



