C O N T K N T S. 



Page 



Art. X. — Study of Some American Fossil Cycads — Part 

 VI. On the Smaller Flower-Buds of Cycadeoidea ; by 

 G. R. Wieland . . - . 73 



XL — Occurrence of Coral" Reefs in the Triassic of North 



America ; by J. P. Smith 92 



XII. — Ordovician Outlier at Hyde Manor in Sudbury, Ver- 

 mont ; by T. X. Dale ____"._; 97 



XIII. — Color-Effect of Isomorphous Mixture ; by H. L. 



Wells __... _ _.. 103 



XIV. — Lorandite from the Rambler Mine, Wyoming ; by 



A. F. Rogers . . _ - 105 



XV. — Rate of Decay of Different Sizes of Xuclei, Deter- 

 mined by Aid of the Coronas of Cloudy Condensation ; 

 by C. Barus 107 



XVI. — Displacement Interferometer Adapted for High Tem- 

 perature Measurement, Adiabatic Transformations of a 

 Gas, etc. ; by C. Barus 109 



XVII. — Unconformity at the Base of the Chattanooga Shale 



in Kentucky ; by E. M. Kindle 120 



XVIII. — Suggestion for Mineral Nomenclature ; by H. S. 



W ASH1NGTOX 137 



XIX. — Optical Resolution of the Saturnian Ring ; by D. 



Todd 152 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Canadium, an Alleged New Element of the Platinum 

 Group, A. G. French : Alleged Complexity of Tellurium, Habcourt and 

 Baker, 155. — New Quantitative Separation of Iron from Manganese, J. A. 

 Sanchez : Famous Chemists, E. Robebis. 156. — Quantitative Chemical 

 Analysis, Clowes and Coleman : Photometric Paddle- "Wheels, J. R. 

 Milne : Text-Book of Physics, L. B. Spinney, 157.— Tables of Physical 

 and Chemical Constants and some Mathematical Functions, G. W. C. 

 Kaye and 1. H. Laby : Electrocheniisehe Umformer, J. Zacharias, 158. 

 — JNeue Welt der Filissigen Kristalle, O. Lehmann, 159. 



Geology and Natural History — Thirty-second Annual Eeport of the United 

 States Geological Survey, G. O. Smith, 159. — Granites of Connecticut, T. 

 N. Dale and H. E. Gregoby, 160. — The Mount McKinley Region, Alaska: 

 Bulletin of the Seismological Society of America, 161. — Atlas Photo- 

 graphiCjUe des Formes du Relief Terrestre, J. Bbunhes, E. Chain, E. de 

 Mabtonne : New Zealand Botanical Notes, B. C. Asxox, 163. — Fungous 

 Diseases of Plants, B. M. Duggab : Practical Botany, J. Y. Bergen and 

 U. W. Caldwell : A Practical Course in Botany, E.* F._ Andrews, 164. 



Miscellaneous Scientific Intelligence — Report of the Secretary of the Smith- 

 sonian Institution, 165. — Report of the Librarian of Congress and Report 

 of the Superintendent of the Library Building, 166. — Das Schicksal der 

 Planeten, S. Abbhexius : The Capture Theory of Cosmical Evolution, T. 

 J. J. See, 167.— The Teaching of Geometry, D. E. Smith : The Hindu- 

 Arabic Numerals, D. E. Smith and L. C. Karpinsky, 16S. 



Obituary— C. E. Ditton. 



