CONTENTS. V 



Number 285. 



Page 



Art. XL — 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. XY. — 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 Joaquina 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. 



Obituary — Lord Eayleigh, 249. — E. H. Haeckel : P. Chopfat, 250. 



