xxi 



Researches on the Decomposition and Disintegration of Phosphatic 

 Vesical Calculi ; and on the introduction of Chemical decomponents 

 into the living Bladder. By S. Elliott Hoskins, M.D page 443 



A Method of proving the three leading properties of the Ellipse and 

 the Hyperbola from a well-known property of the Circle. By Sir 



Frederick Pollock, Knt. F.R.S. Her Majesty's Attorney General.... 443 



On the diurnal Temperature of the Earth's surface, with the discus- 

 sion of a simple formula for ascertaining the same. By S. M. 

 Drach, Esq. F.R.A.S 444 



On the Laws of Individual Tides at Southampton and at Ipswich. By 

 G. B. Airy, Esq. M.A. F.R.S. Astronomer Royal 445 



On the Special Function of the Skin. By Robert Willis, M.D 445 



On the Cause of the reduction of Metals from the solutions of their 

 salts by the Voltaic Circuit. By Alfred Sraee, Esq. F.R.S. Surgeon 

 to the Bank of England 447 



On the import and office of the Lymphatic Vessels. By Robert Willis, 

 M.D 448 



Further Observations on the descending fluids of Plants, and more 

 especially the Cambium. By George Rainey, Esq 449 



Notice of an Extraordinary Luminous Appearance seen in the Heavens 

 on the 17th of March, 1843, in a letter to S. H. Christie, Esq. Sec, 

 R.S. By Sir John F. W. Herschel, Bart. F.R.S 450 



ERRATUM. 



P. 386, line 9, /or " the filaments of which are," read " this filament is.'' 



