C N T E N T S . 



Page 



Art. I. — Spiral Goniometry in its Relation to the Measure- 

 ment of Activity ; by C. Barfs ... 1 



II. — Occurrence of a large area of Nepheline Syenite in the 



Township of Dungannon, Ontario ; by F. D. Adams 10 



III. — Nepheline, Socialite and Orthoclase from the Nepheline 



Syenite of Dungannon, Ontario; by B. J. Harrington 16 



IV. — New Design for large Spectroscope Slits ; by F. L. O. 



Wadsworth. (With Plate I.) . 19 



V. — Tertiary Changes in the Drainage of Southwestern Vir- 

 ginia ; by M. R. Campbell .. _ -21 



VI. — Methods for the Determination of Water; b}' S. L. 



Penfield 30 



VII. — Detection of Alkaline Perchlorates associated with 

 Chlorides, Chlorates, and Nitrates; by F. A. Gooch 

 and D. A. Kreider 38 



VIII. — Upper Vicksburg Eocene and the Chattahoochee 

 Miocene of Southwest Georgia and adjacent Florida; 

 by A. F. Foerste 1 41 



IX. — Gabbros in the Southwestern Adirondack Region ; by 



C. H. Smyth, Jr. _ 54 



Appendix. — X. — Footprints of Vertebrates in the Coal Meas- 

 ures of Kansas; by O. C. Marsh. (With Plates II and 

 III.).. . . 81 



XL — Typical OenithopoDa of the American Jurassic ; by 



O. C. Marsh. (With Plates IV- V1X) 85 



XII. — Eastern Division of the Miohippus Beds with Notes 



on some of the Characteristic Fossils; by O. C. Marsh. 91 



SCIENTIFIC INTELLIGENCE. 



Chemist i ii and Physics — Titration method for determining Molecular Mass, 

 Kustek. 65. — L7se of the Lummer-Brodhun prism in Colorimetry, Kruss: Elec- 

 trolysis by Alternating Currents, Hopkixsox. Wilson and Lydall, 66. — Source 

 of the Hydrogen Peroxide in the Atmosphere, Bach: Explosive Haloid Com- 

 pounds of Nitrogen, Seliwanow, 67. — Preparation of Phosphorus by the Action 

 of Aluminum upon the Phosphates, Rossel and Frank : Production artificially 

 of the Diamond, Moissax. 68. — Electrical Condition of the air in high altitudes, 

 69. 



Geology and Mineralogy— FJnited States Geological Survey, 70. — Introduction 

 to the Study of the Brachiopoda, J. Hall and J. M. Clarice, 71. — Bibliotheque 

 Geologique de la Russie, S. Nitikix : Illustrations of the Fauna of the St. John 

 G v onp, G. P. Matthew. 72. — Fossil resin, E. A. Smith: Papers and Notes on 

 the Glacial Geology of Great Britain and Ireland, H. C. Lewis, 73. — Brief notes 

 on some recently described minerals, 7-4. — Manuel de Mineralogie, A. Pes 

 Cloiseaux, 7 5. 



Astronomy — Total Eclipses of the Sun, M. L. Todd : Publications of the Lick Ob- 

 servatory of the University of California : Prof. M. TJpdegraff, 76. 



Botany — Guide to Sowerby's Models of British Fungi in the Department of Botany, 

 British Museum, 1893, 76. — Monograph of Lichens found in Britain, J. M. 

 Cbombie, 7 7. 



Miscellaneous Scientific Intelligence — Condition of Kilauea, March 20th, 1892. 

 F. S. Dodge: Leicester Earthquake of August 4, 1893, C. Davison. 78. — Con- 

 gres Geologique International, S. F. Ejoions, 79. — International Congress of 

 applied Chemistry, 80. 



