CONTENTS. IX 



Page 

 Professor B. Pierce on the Motion of a Pendulum in a Vertical Plane when 

 the point of suspension moves uniformly on a circumference in the same 

 Plane 37 



Meteorology. 



Mr. John Ball on a Plan for Systematic Observations of Temperature in 



Mountain Countries 3 ' 



Mr. W. R. Birt on Atmospheric Waves 38 



M. Du Boulay's Observations on the Meteorological Phenomena of the Vernal 



Equinoctial Week 39 



Mr. R. Dowden on the Effect of a Rapid Current of Air 39 



Admiral FitzRoy on British Storms, illustrated with Diagrams and Charts .... 39 

 Mr. J. Park Harrison on the Similarity of the Lunar Curves of Minimum 



Temperature at Greenwich and Utrecht in the Year 1859 4 " i 



Professor Hennessy on the Principles of Meteorology 44 



Captain Maury on Antarctic Expeditions 44 



on the Climates of the Antarctic Regions, as indicated by Ob- 

 servations upon the Height of the Barometer and Direction of the Winds at 



c 46 



oea 



Rev. Henry Moseley on the Cause of the Descent of Glaciers 48 



Rev. T. Rankin on Meteorological Observations for 1859, made at Huggate, 



Yorkshire, East Riding 50 



M. R. de Schlagintweit on Thermo-barometers, compared with Barometers 



at great Heights 50 



Captain W. Parker Snow on Practical Experience of the Law of Storms in 



each Quarter of the Globe 52 



Mr. G. J. Symons's Results of an Investigation into the Phenomena of English 



Thunder-storms during the years 1857-59 52 



Professor William Thomson's Notes on Atmospheric Electricity 53 



M. Verdet's Note on the Dispersion of the Planes of Polarization of the 



Coloured Rays produced by the Action of Magnetism* 54 



Mr. E. Vivian's Results of Self-registering Hygrometers 55 



Rev. A. Weld's Results of Ten Years' Meteorological Observations at Stony 



hurst 



56 



General Physics. 

 Mr. J. S. Stuart Glennie, Physics as a Branch of the Science of Motion ... 



56 



, a General Law of Rotation applied to the Planets 58 



Sound. 



Rev. S. Earnshaw on the Velocity of the Sound cf Thunder 58 



on the Triplicity of Sound 58 



Instruments. 



Mr. Patrick Adie's Description of an Instrument for Measuring Actual 

 Distances 9 



* This should have been placed in an earlier division. 



