IV CONTENTS. 



Number 68. 



Page 

 Art. IX. — Experiments on High Electrical Resistance, Part 



II; by O. 1ST. Rood _ 91 



X. — Mineralogical Notes ; by A. J. Moses 98 



XL — Motion of Compressible Fluids; by J. W. Davis „ 107 



XII. — Action of Sodium Thiosulphate on Solutions of Metallic 

 Salts at High Temperatures and Pressures ; by J. T. 

 Norton, Jr. _ 115 



XIII. — Secondary Undulations Shown by Recording Tide- 

 gauges ; by A. W. Duff _ 123 



XIV. — Mathematical Notes to Rival Theories of Cosmogony ; 



by O. Fisher.. _.. __ __ 140 



XV. — Studies of Eocene Mammalia in the Marsh Collection, 



Peabody Museum ; by J. L. Woetman _ _ 143 



XVI. — Electromagnetic Effects of Moving Charged Spheres ; 



by E. P. Adams 155 



XVII. — The Nadir of Temperature and Allied Problems; by 



J. Dewar "_ 168 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Scientific Intelligence — Magnetic effect of Electrical Convection, H. 

 Pender, 173. — American Association for the Advancement of Science, 1*74. 



Obituary. — Dr. Joseph LeConte : Professor Peter Guhtrie Tait, 174. 



