CONTENTS. 



Page 

 Art. XI. — Wollastonite (CaO.Si0 2 ) and related Solid Solu- 

 tions in the Ternary System Lime-Magnesia-Silica; by 

 J. B. Ferguson and H. E. Merwin 165 



Art. XII. — The Extent and Interpretation of the Hogshooter 



Gas Sand; by W. R. Berger 189 



Art. XIII. — Abnormal Birefringence of Torbernite; by N. 



L. Bowen . . . . 195 



Art. XIV. — Organic Structures in the Biwabik Iron-bearing 

 Formation of the Huronian in Minnesota; by F. F. 

 Grout and T. M. Broderick 199 



Art. XV. — Notes on an Unlisted Mineral; by George J. 



Hough 206 



Art. XVI. — Note on the Depth of the Champlain Submer- 

 gence along the Maine Coast; by P. W. Meserve .... 207 



Art. XVII.— On the Correlation of Porto Rican Tertiary 

 Formations with other Antillean and Mainland Horizons; 

 by Carlotta Joaquin a Maury 209 



Art. XVIII. — Geological Notes on the Pribilof Islands, 

 Alaska, with an Account of the Fossil Diatoms; by G. 

 D. Hanna 261 



Art. XIX.— The Framework of the Earth ; by W. M. Davis 225 



George Ferdinand Becker 242 



SCIENTIFIC INTELLIGENCE. 



Geology— Geology and Ore Deposits of Tintic Mining District, Utah, W. Lind- 

 gren and G. F. Loughlin : Genesis of the Ores at Tonapah, Nevada, 

 E. S. Bastin and F. B. Laney, 246— Review of Geology and connected 

 Sciences, 247. 



Miscellaneous Scientific Intelligence— The Whole Truth about Alcohol, G. E. 

 Flint, 247.— The Blind; their' Condition and the Work being done for 

 them in the United States, H. Best : Colloids in Biology and Medi- 

 cine, H. Bechhold, 248. —Aeronautics : United States Coast and Geodetic 

 Survey, 249. 



ObitvMry— Lord Rayleigh, 249 — E. H. Haeckel : P. Choffat, #50. 



