XVI 



On the Diurnal Deviations of the Horizontal Needle when under the 

 influence of Magnets. By Samuel Hunter Christie, Esq. M.A.page 197 



On Fossil Shells. By Lewis Weston Dillwyn, Esq. F.R.S 198 



On the apparent Magnetism of Metallic Titanium. By William Hyde 

 Wollaston, M.D. V.P.R.S 199 



An Account of the Effect of Mercurial Vapours on the Crew of His 

 Majesty's Ship Triumph, in the Year 1810. By William Burnett, 

 M.D 200 



On the Astronomical Refractions. By J. Ivory, A.M. F.R.S 200 



Observations on Air found in the Pleura, in a Case of Pneumato- 

 thorax ; with Experiments on the Absorption of different kinds of 

 Air introduced into the Pleura. By John Davy, M.D. F.R.S 202 



On Bitumen in Stones. By the Right Hon. George Knox, F.R.S. ... 202 



On certain Changes which appear to have taken place in the Positions 

 of some of the principal fixed Stars. By John Pond, Esq. F.R.S. . 203 



1824-. 



The Croonian Lecture. On the Internal Structure of the Human Brain, 

 when examined in the Microscope, as compared with that of Fishes, 

 Insects and Worms. By Sir Everard Home, Bart. V.P.R.S page 203 



Some Observations on the Migration of Birds. By the late Edward 

 Jenner, M.D. F.R.S. ; with an Introductory Letter to Sir Humphry 

 Davy, Bart. P.R.S. By the Rev. G. C. Jenner 204 



On the Nature of the Acid and Saline Matters usually existing in the 

 Stomachs of Animals. By William Prout, M.D. F.R.S 204 



On the North Polar Distances of the principal fixed Stars. By John 

 Brinkley, D.D. F.R.S. &c 205 



On the Figure requisite to maintain the Equilibrium of a Homogeneous 

 Fluid Mass that revolves upon an Axis. By James Ivory, A.M. 

 F.R.S 206 



On the Corrosion of Copper-sheeting by Sea-water, and on Methods 

 of preventing this Effect ; and on their Application to Ships of War 

 and other Ships. By Sir Humphry Davy, Bart. P.R.S 207 



A finite and exact Expression for the Refraction of an Atmosphere 

 nearly resembling that of the Earth. By Thomas Young, M.D. 

 For. Sec. R.S 207 



The Bakerian Lecture. On certain Motions produced in Fluid Con- 

 ductors when transmitting the Electric Current. By J. F. W. Her- 

 schel, Esq. F.R.S 208 



Experiments and Observations on the Development of Magnetical 

 Properties in Steel and Iron by Percussion. Part II. By William 

 Scoresby, Jun. F.R.S.E. &c 210 



On Semi-decussation of the Optic Nerves. By William Hyde Wol- 

 laston, M.D. V.P.R.S 211 



Some curious Facts respecting the Walrus and Seal, discovered by the 

 Examination of Specimens brought to England by the different 

 Ships lately returned from the Polar Circle. By Sir Everard Home, 

 Bart. V.P.R.S. . 213 



