CONTENTS. 



Page 



Art. I. — Theory of an Interglacial Submergence in England ; 



by G. Frederick Wright 1 



II. — Permian of Texas ; by Ralph S. Tarr 9 



III. — Chemical Composition of Iolite ; by O. C. Farrington 13 



IV. — Series of Caesium Trihalides ; by H. L. Wells ; in- 

 cluding their Crystallography; by S. L. Penpield 11 



V. — Law of Elastic Lengthening; by J. O. Thompson 32 



VI. — Method for the Quantitative Separation of Strontium 

 from Calcium by the Action of Amyl Alcohol on the 

 Nitrates ; by P. E. Browning 50 



VII. — Relation of Melting Point to Pressure in Case of Igne- 

 ous rock fusion ; by C. Barus 56 



VIII. — Discovery of Clymenia in the Fauna of the Intumes- 

 cens-zone (Naples beds) of Western New York, and its 

 Geological Significance ; by John M. Clarke 57 



IX. — New Meteoric Iron from Garrett Co., Maryland ; by 



A. E. Foote. With Plate I '__. 64 



X. — Farmington, Washington Co., Kansas Aerolite; by G. 



F. Kunz and E. Weinschenk 65 



XI. — Appendix — Skull of Torosaurus ; by O. C. Marsh. 



With Plates II and III 81 



SCIENTIFIC INTELLIGENCE. ' 



Chemistry aud Physics — On Jsomorphism. Eetgers, 68. — Crystallized Persul- 

 phates, Marshall. 69. — Preservation of Sodium, Rosenfeld: New Oxygen 

 Compounds of Molydenum and of Tungsten, Pechari>, 70. 



Geology and Mineralogy — Bibliography undertaken by the International Congress of 

 Geologists, 71. — Experimental researches, etc., A. Baubree, 73. — Classification 

 of Mountain Ranges according to their Structure, Origin and Age, W. Upham, 

 74. — Geology of Quebec City, Canada, H. M. Ami, 75. — Geological and Natural 

 History Survey of Canada: Notes on Brazilian Mineralogy, E. Hussae:, 77. — 

 Estimation of the Optical Angle. A. C. Lane : Systematic Mineralc based 

 upon a Natural Classification, T. S. Hunt: The Phosphates of Am 'ca, P. 

 Wyatt, 79. — Kiowa Co. (Kansas) Meteorite, R. Hay: Geological Su ey of 

 Keutucky, John R. Procter, Director, G. M. Sullivan, 80.' 



Obituary — Henry Nottidge Mosely: Philip Herbert Carpenter, 80. 



