To Binders— The Appendix consisting of the Gray Bibliography and 

 Index should be put at the close of the volume. 



CONTENTS. 



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. Barus . _ 427 



XLIV. — Puget Group of Washington Territory ; by C. A. 



White 443 



XLV. — 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, 467. — Light and Electricity, Lord 

 Rayleigh : 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 YIII: 

 Tuckerman Memorial Library, 476. 



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

 Powell, 476a. 



Index to Volume XXXVI, 479. 



