CONTENTS. 



Patfc 



Art. I. — Origin and Significance of Spines: a Study in Evo- 

 lution; by C. E. Beeciier. (With Plate I.) 1 



II. — Electrical Discharge from the point of view of the 



Kinetic Theory of Matter ; by J. E. Moore 21 



III. — Crystalline Symmetry of Torbernite; by T. L. 



Walker _ ___ 41 



IV. — Further Separations of Aluminum by Hydrochloric 



Acid ; by F. S. Havens .' 45 



V. — Origin of the Corundum associated with the Peridotites 



in North Carolina ; by J. H. Pratt 49 



VI. — Erionite, a new Zeolite ; by A. S. Eakle 66 



VII. — Winter Condition of the Reserve Food Substances in 

 the Stems of certain Deciduous Trees ; by E. M. Wil- 

 cox 69 



VIII. — Metamorphism of Rocks and Rock Flowage; by C. 



R. Van Hise 75 



IX: — New Species of Ceratopsia ; by O. C. Marsh 92 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Vapor Pressure of reciprocally soluble Liquids, Ostwald: 

 Electric Energy by Atmospheric Action, Warren : Significance of Ionic Reac- 

 tions in Electrochemistry, Kuster, 93. — Photoelectric Properties of Certain 

 Colored Salts, Elster and Geitel, 94. — Combustion is Rarefied Air, Benedi- 

 centi: Molecular Masses of Solid Subs.tances, Traube, 95. — Liquefaction of 

 Hydrogen, Dewar, 96. — New Methods for the Measurement of Self-Inductance, 

 Mutual Inductance and Capacity, H. A. Rowland and T, D. Penniman, 97.— 

 Notes on the Zeeman Effect, J. S. Ames, R. F. Earhart and H. M. Reese, 99. 

 — Elementary Course of Physics, J. C. P. Aldous, 100. — Storage Battery, A. 

 Treadwell, Jr., 101. 



Geology and Natural History — Important Vertebrate Fossils for the National Mu- 

 seum, 0. C. Marsh, 101. — U. S. Geological Survey: Occurrence of Petroleum 

 in Burma, F. Noetling, 102. — Text-book of Entomology, A. S. Packard: 

 Bibliotheca Zoologica II., O. Taschenberg, 103. 



Miscellaneous Scientific Intelligence — Seestudien, E. Richter, 103.- 

 bian- Museum, 104. 



-Field Colum- 



