NUMBER LXVI. 

 Liy.— Note on the Duplicity of t.hp " 

 Solar Spectrum ; by C. A. Youn 

 ^ iLithia-t • - 



LY.— On a Lithia-bearing Biotite; by G. W. Hawks, 

 8 on the Solid Carbc 

 Lawrence Smith,. 



)f Experiments on C „__ , ^, 



Norton, 442 



LVI— Researches on the Solid Carbon Compounds i'n Mete- 

 orites; by J. Lawrence Smith, 



L^V^IL— Results of Experiments on Contact Resistance ; 



J'^^^V^^^^^'^^^ Observations on'SaturnVby L^ "Trouvelot, 447 

 •^T^'^^^^ ^^ Eccentricity of the Earth's orbit ; by R. W. 



McFarland, •' 45g 



LX.— On a Bolide of January 31st, that passed over Ken- 

 tucky ; by J. Lawrence Smith, 458 



LXI.— Notes on the Sensitiveness of Silver Bromide Vo'the 

 Green Rays as modified by the Presence of other Sub- 

 stances; by M. Carey Lea, ^ 459 



J^™--~^rSu'^l?'^^*^''^P''^'^''''' of Durangite; by G^. J. Brush, 464 

 t5SJ-~S''' Geological Survey of Brazil; by C. F. Hartt,, 466 

 T 5Jr "T?^,^*''''''''' ^^-^"^ ^^ Waconda ; by C. U. Shepard, Sr., 473 

 ^-^^— Paleozoic Subdivisions on the 40th Parallel; by 



Clarence King, 475 



J^fJJ-—^ Nebula-photometer ; by E."c^ Picke'ring," '/.'.'. '. . 482 

 T ^^V""^."? ^ ""^^ Sub-order of Pterosauria ; by O. C. Marsh, 507 

 LX VIIL^Notice of new Odontornithes ; by O. C. Marsh, .... 509 



SCIENTIFIC INTELLIGENCE. 

 Ch^istry andFhysic^.-HydrocelMose, Gieard, 483.-Decomposition of Stearic 

 Acid by distillation under Pressure, Johnston: Liquid Carbon Dioxide in min- 

 eral cavities, Hartley: Decomposition of Alcohol by Aluminum 

 Gladstone and Tribe, 484.— New Method for produi " - ^ 

 bons Watson Smith: Manganese Boride and on the J^'unction of Manganese in 

 Iron MetaUurgy, Troost and HAUTEPEtnLLE, 485.— Occurrence of Platinum, Pal- 

 ladium, and Selenium m SUver coins, Rossleb: Conversion of Oleflnes into the 

 corresponding Alcohols, Boutlebow, 486.— Trimethylbenzols of Coal tar Oil 



cing Condensed Hydrc 



Ritthausen: Acoustic Attractions, DvoBAK;488._Correlation of Forces, Grove; 

 StorrSEcTm 490 *"'' Conductors, Exnbb : Proper Motion of the 



Geology and Mineralogy.— Paleozoic fossUs from the Serpentine formation of 

 Chaberton 491.-Eozoon Canadense: Exploration of Lake Titicaca, A. Agassiz 

 *^2~^'^'"*""^° ^°"*^ °* ^^^^ Superior, Roland Ibving: fossil bird from 

 the bocene of New Mexico, Cope: Richmond Infusorial Stratum 493 —Car- 

 boniferous Articulates : Note on the Uinta and Wahsatch Ranges, C. King: 

 Ceraurus pleurexanthemus, of Trenton FaUs. C. D. Walcott 494 —Glacial 

 phenomena in Jefferson Co., Xew York: Origin of the Porphyry of Marble- 

 neaa Mass., 495.— Hayden's Report for 1874, 496.— Age of Angiospermous 

 plants referred to the Cretaceous, 497.-Swi8s Paleontological S^iety: Geo- 

 logical Survey of New Jersey, CooK: Eocene Corals of ItSy, 498.— Crvstallo- 

 graphy, of P. Groth, 499. ^ ^ 



" ' ' a TUibiche, Peru. A. Agassiz, 499.— Caspian Sea, 500. 



Astronomy.— Tranait of Venus observed in Bengal: new Planets, 501 

 Miscellaneoy^ ScienU/k InteUigence.—Atti deUa Reale Accademia dei Lincei 



Statistics of Mines and Mining R. W. Raymond, 504.— National Acad'e^, .. 



Sciences: Memoir of Caroline Herschel, 505.— Depth of the Pacific, 506. 



