XII 



An Account of Experiments to determine the Acceleration of the Pen- 

 dulum in different Latitudes. By Captain Edward Sabine, F.R.S. 

 andF.L.S page 144 



Some Observations and Experiments on the Papyri found in the Ruins 

 of Herculaneum. By Sir Humphry Davy, Bart P.R.S 145 



Observations on Naphthaline, a peculiar Substance resembling a Con- 

 crete Essential Oil, which is apparently produced during the Decom- 

 position of Coal Tar, by Exposure to a Red Heat. By J. Kidd, M.D. 146 



On the Aberrations of Compound Lenses and Object-Glasses. By 

 J. F. W. Herschel, Esq. P.R.S. &c 146 



An Account of the Skeletons of the Dugong, Two-homed Rhinoceros, 

 and Tapir of Sumatra, sent to England by Sir Thomas Stamford 

 Raffles, Governor of Beucoolen. By Sir Everard Home, Bart. 

 V.P.R.S 147 



On the Mean Density of the Earth. By Dr. Charles Button, F.R.S. 148 



On the Separation of Iron from other Metals. By J. F. W. Herschel, 

 Esq. F.R.S 148 



On the Re-establishment of a Canal in the Place of a Portion of the 

 Urethra which had been destroyed. By Henry Earle, Esq 149 



Calculations of some Observations of the Solar Eclipse on the 7th of 

 September, 1820. By Mr. Charles Rumker 150 



An Account of the Re-measurement of the Cube, Cylinder, and Sphere, 

 used by the late Sir George Shuckburgh Evelyn, in his Inquiries 

 respecting a Standard of Weights and Measures. By Captain Henry 

 Kater, F.R.S 150 



An Account of Observations made with the Eight-Feet Astronomical 

 Circle, at the Observatory of Trinity College, Dublin, since the Be- 

 ginning of the Year 1818, for Investigating the Effects of Parallax 

 and Aberration on the Places of certain fixed Stars ; also the Com- 

 parison of these with former Observations for determining the Effects 

 of Lunar Nutation. By the Reverend John Brinkley, D.D. F.R.S. 

 and M.R.I.A 151 



On the Effects produced in the Rates of Chronometers by the Proximity 

 of Masses of Iron. By Peter Barlow, Esq 152 



On the Peculiarities that distinguish the Manatee of the West Indies 

 from the Dugong of the East Indian Seas. By Sir Everard Home, 

 Bart. V.P.R.S 152 



On a New Compound of Chlorine and Carbon. By Richard Phillips, 

 F.R.S.E. F.L.S. M.G.S. &c. and Michael Faraday 153 



On the Nerves ; giving an Account of some Experiments on their 

 Structure and Functions, which lead to a new Arrangement of the 

 System. By Charles Bell, Esq 153 



Further Researches on the Magnetic Phenomena produced by Electri- 

 city ; with some New Experiments on the Properties of Electrified 

 Bodies in their Relations to Conducting Powers and Temperature. 

 By Sir Humphry Davy, Bart. P.R.S 154 



