CONTENTS. 



Page. 

 Art. I. — The- Age of the Earth.; by Clarence King, With 



Plates I and II _•_ ■. ... •_ 1 



II. — Tertiary Geology of Calvert Cliffs, Maryland ; by Gil- 

 bert D. Harris .*.....'. 21 



III. — "Anglesite" associated with Boleite ; by F. A. Genth 32 

 IV.— Preliminary Account of the Iced Bar Base Apparatus 



of the IT. S. Coast and Geodetic Survey ; by R. .S. 



Woodward 33 



V. — Some Experiments with an Artificial Geyser; by J. C. 



Graham ..:.: .- 54 



VI. — Observations of the Andromecl Meteors of November 



23d and 2?th, 1892; by H. A. Newton .' ... 61 



VII. — Preliminary Notice of a Meteoric Stone seen to fall at 



Bath, South Dakota; by A. E. Foote. With Plate III 64 

 VIII. — Appendix — New Cretaceous Bird allied to Hesper- 



ornis ; by O. C. Marsh „_ 81 



IX. — Skull and Brain of Claosaurus; by O. C. Marsh. 



With Plates IV and V ..'... 83 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Influence of Foreign substances on the Form, the Size 

 and the Purity of Crystals separating from a solution, Retgers, 65. — Resolu- 

 tion of Lactic Acid into Optically active Constituents, PubdIe and Walker: 

 New element Masrium. Richmond and Off, G6. — Freeziug points of very dilute 

 Solutions, Raoult, 67.— Chemical Lecture Experiments. G. S. Newth: Color 

 Photography, M. G. Lippman: Infra red spectra of the Alkali Metals, B. W. 

 Snow, 68,— Magnetic" effect of the Sun upon the Earth, W. Thomson: Sound 

 and Music, J. A. Zahm, 69. . 



■Geology and Mineralogy — View of the Ice Age as One Glacial Epoch, 70. — Pleis- 

 tocene History of Northeastern Iowa. W-. J. McGee, 71. — Note on the paper in 

 tfie November No. of this Journal on "A. New Oriskany Fauna in New York." 

 S. T. Barrett: Subdivisions of the Azoic or Archaean in. Northern Michigan, 

 M. E. Wadsworth. 72. — Geological and Natural History Survey of Minnesota, 

 N. H. Winchell : Final Report of the Pennsylvania Geological Survey, Les- 

 ley: Arkansas Geological Survey : Geological Map of Baltimore and its Vicin- 

 ity: Devonian Fishes of Canada, A. S. "Woodward, 73. — Nepheline Rocks in 

 Brazil, 0. A. Derby: Panama Geology, M. Douyille: Geological Map of Scot- 

 land, A. Geikie : Quaternary Carnivores found on the island of Malta : Excava- 

 tion by Glaciers: Chamberlin on the Glacial period, 74. — Mikroskopische 

 Physiographie der petrographisch wichtigen Mineralien, von H. Rosenbusch: 

 Gesteine de Ecuatonanische West Cordillere, M. Belowsey : Chemical Contri- 

 butions to the Geology of Canada. G. C. Hoffmann. 75. — Presence of Magne- 

 tite in certain Minerals and Rocks, Liversidge: Manual of Qualitative Blow- 

 pipe Analysis and Determinative Mineralogy, F. M. Endlich, 76. 



Miscellaneous Scientific Intelligence — Geminid Meteors of Dec. 11. 1892 : La Planete 

 Mars et ses Conditions. d'Habitabilite, Camille Flammarion, 77. — Investiga- 

 tion of the Coral Reefs of the 'West Indies, A. Agassiz: Gelatine slides for 

 lantern projection, W. J. Waggener: Transactions of the Texas Academy of 

 Science: Die Klassiker der exakten Wissenschaften, W. Ostwald, 78. — Royal 

 Society of London, 79. 



Obituary — John Strong Newberry, 79. — Sir Richard Owen, SO. 



