CONTENTS OF VOL. XLVIII 



(FOURTH SERIES.) 



NUMBER CCCXY.— JULY 1874. 



Page 



Prof. R. Clausius on different Forms of the Yirial 1 



Mr. F. P. Purvis on Amsler's Planimeter 11 



Prof. A. AY. Wright on the Polarization of the Zodiacal Light. 13 

 Baron N. Schilling on the Constant Currents in the Air and 



in the Sea : an Attempt to refer them to a common Cause . . 21 

 Mr. R. Mallet on the Tidal Retardation of the Earth's Rotation. 38 

 Mr. E. AY. Hilgard on some points in Mallet's Theory of Yul- 



eanicity 41 



Mr. J. AY. L. Glaisher on a New Formula in Definite Integrals. 53 

 Dr. J. Rae on some Physical Properties of Ice ; on the Trans- 

 position of Boulders from below to above the Ice; and on 



Mammoth-remains 56 



Mr. F. Clowes on a Glass Cell with Parallel Sides 61 



Notices respecting New Books : — 



Mr. T. M. Goodeve's Principles of Mechanics 62 



The Rev. S. J. Johnson on Eclipses Past and Future, with 



General Hints for Observing the Heavens 64 



Proceedings of the Royal Society : — 



Mr. AY. Crookes on the Action of Heat on Gravitating 



Masses 65 



Mr. G. Gore on Electrotorsion 70 



Proceedings of the Geological Society : — 



His Grace the Duke of Argyll on Six Lake-basins in 



Argyllshire 72 



Prof. R. Owen on the Skull of a dentigerous Bird 73 



Mr. J. AY. Hulke on the Anatomy of Hypsilophodon Foxii. 74 

 Mr. J. Geikie on the Glacial Phenomena of the " Long 



Island" 74 



Mr. J. E. Campbell on the Glacial Phenomena of the 



Hebrides 75 



Prof. P. M. Duncan on Fossil Corals from the Eocene 



Formation of the West Indies 76 



Mr. R. Etheridge on the Lignite-deposit of Lal-Lal, Yic- 



toria, Australia 76 



On the Flow of Saline Solutions through Capillary Tubes, by 



Theodore Hiibener 77 



On Melde's Experiment, by AY. Lowery 78 



On Constant Electric Currents, by M. Heine, of Halle 79 



On the Nature of the Action of Light upon Silver Bromide, 

 by M. Carey Lea, Philadelphia 80 



