IV CONTENTS. 



Number 110. 



Page 

 Art. VII. — Isomorphism and Thermal Properties of the 

 Feldspars ; by A. L. Day and E. T. Allen. (With 

 Plate I) _ _ 93 



VIII. — Progress of the Albatross Expedition to the Eastern 



Pacific ; by A. Agassiz 143 



IX. — Measurement of Self-Inductance; by J. B. Whitehead 



andH. D. Hill 149 



X. — Climatic Features in the Land Surface ; by A. Penck _ 165 



XI. — Preliminary Results with an Objective Method of 

 Showing Distribution of Nuclei Produced by the X-rays, 

 for Instance ; by C. Barus .__ 175 



XII. — Radio-active Measurements by a Constant Deflection 



Method ; by H. L. Bronson . . _ 185 



XIII. — Convenient Apparatus for Determining Volatile Sub- 

 stances by Loss of Weight ; by J. L. Kreider 188 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Canyon Diablo Meteorite, Moissan : Metallic Cal- 

 cium, K. Arndt, 191. — Use of Dried Air in Blast-furnaces, Le Chatelier : 

 Trisulphoxyarsenic Acid, McCay and Foster, 192. — Electrolysis of Solid 

 Electrolytes, Haber and Tolloczko : Determination of Fluorine in Wine 

 and Beer, Tread well and Koch : Direction and Velocity of Electric 

 Discharges in Vacuum Tubes, J. James, 193. — Extinction of the Electric 

 Spark, J. Koch : Exhaustion of Geissler Tubes by the Electric Current, E. 

 Eiecke, 194. — N-rays, A. Broca : Recent Development of Physical Science, 

 W, C. D. Whetham, 195. — Outlines of Physiological Chemistry, S. P. 

 Beebe and B. H. Buxton, 19G. 



Geology and Mineralogy. — Geological Survey of Canada : Iowa Geological Sur- 

 vey, 196.— Glaciationin South Africa, M. E. Frames : Ueber Untersilur in 

 Venezuela, F. Drevermann, 197. — Devonian Fauna of Kwataboahegan 

 River, W. A. Parks, 198. — Ueber den Bau und die Organisation der 

 Lyttoniidae Waagen, F. Noetling, 199. — Tower of Pelee : New Studies of 

 the Great Volcano of Martinique, A. Heilprin, 200. — Jiingeren Gesteine 

 der Ecuatorianischen Ost-Cordillere, F. Tannhauser : Alteren Gesteine 

 der Ecuatorianischen Ost-Cordillere, F. von Wolff : Ueber die Chemische 

 Zusammensetzung der Eruptivgesteine in den Gebieten von Predazzo und 

 Monzoni, J. Romberg : Heptorit, ein-hauyn-monchiquit aus dem Siebenge- 

 birge am Rhein, K. Busz, 201. — Kristallinen Schiefer, I, Allgemeiner 

 Theil, U. Grubenmann : Yttrium and Ytterbium in Fluorite, W. J. 

 Humphreys ; Hamlinite from Brazil, 202. 



Miscellaneous Scientific Intelligence. —Publications of the Yale Observatory : 

 Publications of the Yerkes Observatory, Vol. II, 1903, 203.— How to Know 

 the Starry Heavens ; a Study of Suns and Worlds, E. Irving : Jefferis 

 Mineral Collection : The Chemical Engineer, 204. 



Obituary — Dr. Benjamin W. Frazier. 



