On a new Principle of constructing His Majesty's Ships of War. By 

 Robert Seppings, Esq page 496 



Remarks on the Employment of Oblique Riders, and on other Alterations 

 in the Construction of Ships. Being the Substance of a Report pre- 

 sented to the Board of Admiralty; with additional Demonstrations 

 and Illustrations. By Thomas Young, M.D. For. Sec. R.S 498 



Some further Observations on Atmospherical Refraction. By Stephen 

 Groombridge, Esq. F.R.S 500 



Propositions containing some Properties of Tangents to Circles ; and 

 of Trapeziums inscribed in Circles, and non-inscribed. Together 

 with Propositions on the Elliptic Representations of Circles, upon 

 a plane Surface, by Perspective. By Richard Hey, LL.D 502 



On new Properties of Light exhibited in the optical Phenomena of 

 Mother-of- Pearl, and other Bodies to which the superficial Structure 

 of that Substance can be communicated. By David Brewster, LL.D. 

 F.R.S. Edin. and F.S.A. Edin 502 



An improved Method of dividing Astronomical Circles and other In- 

 struments. By Capt. Henry Kater 504 



Results of some recent Experiments on the Properties impressed upon 

 Light by the Action of Glass raised to different Temperatures, and 

 cooled under different Circumstances. By David Brewster, LL.D. 

 F.R.S. Edin. and F.A.S. Edin 506 



Consideration of various Points of Analysis. By John F. W. Herschel, 

 Esq. F.R.S 506 



Observations on the Functions of the Brain. By Sir Everard Home, 

 Bart. F.R.S 507 



Further Experiments and Observations on Iodine. By Sir Humphry 

 Davy, LL.D. F.R.S. V.P.R.1 507 



Observations respecting the natural Production of Saltpetre on the Walls 

 of subterraneous and other Buildings. By John Kidd, M.D 509 



On the Nature .of the Salts termed triple Prussiates, and on Acids 

 formed by the Union of certain Bodies with the Elements of the 

 Prussic Acid. By Robert Porrett, jun. Esq 510 



Some Experiments on the Combustion of the Diamond and other car- 

 bonaceous Substances. By Sir Humphry Davy, LL.D. F.R.S. 

 V.P.R.I . :..... 511 



Some Account of the fossil Remains of an Animal more nearly allied 

 to Fishes than any of the other Classes of Animals. By Sir Everard 

 Home, Bart. F.R.S 512 



On an easier Mode of procuring Potassium than that which is now 

 adopted. By Smithson Tennant, Esq. F.R.S 513 



On the Influence of the Nerves upon the Action of the Arteries. By 

 Sir Everard Home, Bart. F.R.S 513 



On the Means of producing a double Distillation by the same Heat. 

 By Smithson Tennant, Esq. F.R.S 514 



An Account of some Experiments on Animal Heat. By John Davy, 

 M.D. F.R.S. .. 515 



