IV CONTENTS. 



Number 230. 



Page 

 Art. VII. — Physiography and Glacial Geology of the North 



ern Catskill Mountains ; by J. L. Rich 137 



VIII.— Outbreak of Mauna Loa, Hawaii, 1914 ; by T. A. 



Jaggar, Jr „ _ 167 



IX. — Carboniferous Plant Tissue; by E. H. Barbour 173 



X. — Crystallization — Differentiation in Silicate Liquids ; by 



N. L. Bowen 175 



XI. — Bottom Currents in Lake Ontario ; by E. M. Kindle _ 192 



XII. — Separation and Estimation of Aluminium associated 

 with Iron, by the Action of Acetyl Chloride in Acetone ; 

 by H. D. Minnig. _„ 197 



XIII.— Solar Constant ; by F. W. Very. 201 



XIV. — An Eocene Ancestor of the Zapodilla ; by E. W. 



Berry. (With Plate I) . 208 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Molecular Weight of Sodium Carbonate and the 

 Atomic Weight of Carbon referred to Silver and Bromine, Eichards and 

 Hoover, 213. — Molecular Weight of Sodium Sulphate and Atomic Weight 

 of Sulphur, Eichards and Hoover : Separation of Tungsten and Moly- 

 denum, E. E. Marbaker, 214. — Standardization of Acidimetric Solu- 

 tions, E. D. Dodge : Chemical Technology and Analysis of Oils, Fats and 

 Waxes (J. Lewkowitsch), G. H. Warburton : High Frequency Spectra 

 of the Elements, 215.— Bifilar Property of Twisted Strips, J. C. Buckley, 

 216. — Volatility of Thorium D, A. B. Wood : Lecture Experiment on Dis- 

 persion, S. P. Thompson, 218. — Experimental Studies in Electricity and 

 Magnetism, F. E. Nipher: Smithsonian Physical Tables, F. E. Fowle, 219. 



Geology and Mineralogy — " Ferns Ledges" Carboniferous Flora of St. John, 

 N. B., M. C. Stopes, 219.— Pre- Cambrian Algonkian Algal Flora, C. D. 

 Walcott : Petrology of the Orijarvi Eegion in Southwestern Finland, 

 P. Eskola, 221.— The Crowsnest Volcanics, J. D. Mackenzie, 222. — 

 Mineral Empressite, W. M. Bradley ; 223. — Eeport of Director of Bureau 

 of Mines, J. A. Holmes, 224. 



Miscellaneous Scientific Intelligence — Annual Eeport of the Secretary of 

 Commerce, W. C. Bedfield : Work and Needs of the United States Coast 

 and Geodetic Suiwey, 225. — Eeport of Secretary of Smithsonian Institu- 

 tion, C. D. Walcott. 227. — Annual Eeport of Board of Eegents of Smith- 

 sonian Institution: Proceedings of the National Academy of Sciences, 

 238. — Memoirs of the National Academy of Sciences : Samuel Franklin 

 Emmons Memorial Fellowship : Feeblemindedness : Its Causes and Con- 

 sequences, H. H. Goddard, 229. — Awards by the Franklin Institute, 230. 



Obituary — C. S. Minot : A. C. Peale : J. Muir : J. W. Hittorf : N. Crist- 

 offer Duner : M.C . Cooke : J. Borgmann, 230. 



