Vlll CONTENTS. 



NiimTDer 216. 



Page 



Art. XLI. — The Invisible Solar and Lunar Spectrum; by 



S. P. Langley. With Plates IX and X 397 



XLII. — A brief history of Taconic ideas; by J. D. Dana... 410 

 XLIII. — Certain Generic Electrical Relations of the Alloys 



of Platinum ; by C. Bartts _ 427 



XLIY. — Puget Group of Washington' Territory; by C. A. 



White 443 



XLY. — Sulphantimonites from Colorado ; by L. G. Eakins _ 450 

 XLYI. — Voltametric Measurement of Alternating Currents ; 



by A. E. Kennelly _ . . 453 



XL VII. — Fauna of the Great Smoky Mountains ; by C. H. 



Merriam ___ 458 



XL VIII. — New Thorium Mineral, Auerlite ; by W. E. Hidden 



and J. B. Mackintosh 461 



XLIX. — New Sodium sulphato-chloride, Sulphohalite ; by 



W. E. Hidden and J. B. Mackintosh . . _ .... 463 



L. — Appendix : Horned Dinosaurs from the Cretaceous ; 



byO.C. Marsh. With Plate XI __ 477 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Vapor-density of Aluminum chloride, Friedel and 

 Crafts: Freezing mixtures containing solid Carbon dioxide, Cailletet and 

 Colardeau, 465. — Determination of the Heat of Combustion of Coal, Scheurer- 

 Kestner, 466. — Wave-length of the Double red line in the spectrum of Potas- 

 sium, Deslandres : Electrical discharges in gases and flames, E. Wiedemann 

 and H. Ebert: Electrodynamic effect produced by the movement of a dielectric 

 in an electrical field. W. C. Rontgen, 46*7. — Light and Electricity, Lord 

 Ratleigh: The energy stored in permanent strains, C. Barus, 468. 



Geology and Mineralogy. — International Congress of Geology, 468. — American 

 Report to the International Congress of Geologists, 469. — Volcanic Phenomena 

 of the Eruption of Krakatoa, J. W. Judd : Microscopical Physiography of the 

 Rock-making Minerals and aid to the microscopical study of rocks, H. Rosen- 

 busch and J. P. Iddings, 471. — Phenacite in New England, G. F. Kunz, 472. 



Botany. — Color-granules in flowers and fruits, Courchet, 472. 



Miscellaneous Scientific Intelligence. — American Eclipse Expedition to Japan, D. P. 

 Todd, 474. — National Academy of Sciences, 475. — Note to Article VIII: 

 Tuckerman Memorial Library, 476. 



Communication on the American Report of the International Congress, J. W. 

 Powell, 476a. 



Index to Volume XXXVI, 479. 



B^° Appendix of the Gray Bibliography and Index, issued in numbers for 

 September and October. 



