XXV 



Some Observations on the Functions of the Nervous System, and the 

 relation which they bear to the other vital Functions. By Alexan- 

 der Philip Wilson Philip, M.D. F.R.S. L. & E page 373 



On the Respiration of Birds. By William Allen and William Hasle- 

 dine Pepys, Esqrs. Fellows of the Royal Society 375 



On the spontaneous Purification of Thames Water. By John Bostock, 

 M.D. F.R.S. &c 376 



On the Composition of Chloride of Barium. By Edward Turner, M.D. 377 



On a new Series of periodical Colours produced by the grooved Sur- 

 faces of Metallic and Transparent Bodies. By David Brewster, 

 LL.D. F.R.S. L.&E 378 



On the Nerves of the Face ; being a second Paper on that Subject. 

 By Charles Bell, Esq. F.R.S 380 



On the Reduction to a Vacuum of Captain Kater's convertible Pendu- 

 lum. By Captain Edward Sabine, Sec. R.S 381 



On the geometrical Representation of the Powers of Quantities, whose 

 Indices involve the Square Roots of negative Quantities. By the 

 Rev. John Warren, M.A 382 



An experimental Examination of the Electric and Chemical Theories 

 of Galvanism. By William Ritchie, A.M. F.R.S 382 



1830. 



The Bakerian Lecture. On the Manufacture of Glass for Optical 

 Purposes. By Michael Faraday, Esq. F.R.S. &c page 3b3 



Account of Levellings carried across the Isthmus of Panama, to ascer- 

 tain the relative Height of the Pacific Ocean at Panama, and of the 

 Atlantic at the mouth of the River Chagres ; accompanied by Geo- 

 graphical and Topographical Notices of the Isthmus. By John 

 Augustus Lloyd, Esq 385 



On the Law of the partial Polarization of Light by Reflexion. By 

 David Brewster, LL.D. F.R.S. L. & E 387 



A Report on the Stomach of the Zariffa. By Sir Everard Home, Bart. 

 V.P.R.S 389 



On the Production of regular double Refraction in the Molecules of 

 Bodies by simple Pressure ; with Observations on the Origin of the 

 doubly refracting Structure. By David Brewster, LL.D. F.R.S. 

 L.&E. 389 



Experiments on the Influence of the Aurora Borealis on the Magnetic 

 Needle. By the Rev. James Farquharson, F.R.S 391 



Remarks on several Icebergs which have been met with in unusually 

 low Latitudes in the Southern Hemisphere. By Captain James 

 Horsburgh, F.R.S 392 



On the progressive Improvements made in the Efficiency of Steam 

 Engines in Cornwall ; with Investigations of the Methods best 

 adapted for imparting great angular Velocities. By Davies Gil- 

 bert, Esq. P.R.S 393 



On the Laws of the Polarization of Light by Refraction. By David 



Brewster, LL.D. F.R.S.L.&E 394 



c 



