IV CONTENTS. 



Number 218. 



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 L. 

 N ichols 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 Troyv^- 



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 Mrontops robustus, 

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

 Plate VI 163 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Intelligence — American Geological Society: Miueral Resources of 

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

 SCHMIDT, 162. 



