CONTEXTS 



Page. 



Art. — X. — Points in the Geological History of the islands 

 Maui and Oahu; by James D. Dana. With Plates 

 III and IV 81 



XI. — Experiment bearing upon the Question of the Direction 

 and Velocity of the Electric Current; by Edward Xi. 

 Nichols and William S. Franklin 103 



XII. — Occurrence of Monazite as an accessory Element in 



Rocks ; by Orville A. Derby .. 109 



XIII. — Use of Steam in Spectrum Analysis; by John Trow- 

 bridge and W. C. Sabine 114 



XIV. — New Personal Equation Machine ; by A. G. Winter- 

 halter 116 



XV. — Subsidence of Fine Solid Particles in Liquids ; by 



Carl Barus _• 122 



XVI. — Comparison of the Electric Theory of Light and Sir 

 William Thomson's Theory of a Quasi-labile Ether; by 



J. WlLLARD GlBBS 129 



XVII. — Geology of Fernando de Noronha. Part I ; by 



John C. Branner. With a map, Plate V . 145 



XVIII. — Appendix: Restoration of Brontops robustus, 

 from the Miocene of America ; by O. C. Marsh. With 

 Plate VI 163 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Intelligence — American Geological Society: Mineral Resources of 

 the United States, Day : Index der Krystallformen der Mineralien, Gold- 

 schiiidt. 162. 



BIECIKIIER BROTHERS, 

 No. 6 Murray Street, New York, 



Manufacturers of Balances and Weights of Precision for Chem- 

 ists, Assayers, Jewelers, Druggists, and in general for every use 

 where accuracy is required. 



Drawings of fossils and shells made, and museum work done by 

 Dr. OTTO MEYER, 



54 East 7th Street, New York. 



