XXIV 



1829. 



The Bakerian Lecture. On a Method of rendering Platina malleable. 

 By William Hyde Wolkston, M.D. F.R.S. &c page 352 



A Description of a Microscopic Doublet. By William Hyde Wol- 

 kston, M.D. F.R.S. &c 353 



An Account of some Experiments on the Torpedo. By Sir Humphry 

 Davy, Bart. F.R.S 354 



On a Method of comparing the Light of the Sun with that of the Fixed 

 Stars. By William Hyde Wollaston, M.D. F.R.S 355 



On the Water of the Mediterranean. By William Hyde Wollaston, 

 M.D. F.R.S 355 



An Account of the preliminary Experiments and ultimate Construc- 

 tion of a Refracting Telescope of 7'8 inches aperture, with a fluid 

 concave Lens. By Peter Barlow, Esq. F.R.S. &c 356 



On the Dip of the Magnetic Needle in London, in August, 1 828. By 

 Captain Edward Sabine, Sec. R.S 357 



Remarks on the tendency to Calculous Diseases ; with Observations 

 on the Nature of urinary Concretions, and an Analysis of a large 

 Part of the Collection belonging to the Norfolk and Norwich Ho- 

 spital. By John Yelloly, M.D. F.R.S. &c 359 



Experiments to determine the Difference in the Number of Vibrations 

 made by an Invariable Pendulum in the Royal Observatory at Green- 

 wich, and in the House in London in which Captain Kater's Expe- 

 riments were made. By Captain Edward Sabine, Sec. R.S 360 



On a definite Arrangement, and Order of the Appearance and Progress, 

 of the Aurora Borealis ; and on its Height above the Surface of the 

 Earth. By the Rev. James Farquharson 360 



Observations on the Functions of the Intestinal Canal and Liver of the 



human Foetus. By Robert Lee, M.D 361 



Experiments on the Modulus of Torsion. By Benjamin Bevan, Esq. 362 

 On a Differential Barometer. By the late William Hyde Wollaston, 

 M.D. F.R.S 363 



Some Observations relating to the Function of Digestion. By A. P. 



W. Philip, M.D. F.R.S. L. & E 364 



Experiments on the Friction and Abrasion of the Surfaces of Solids. 



By George Rennie, Esq. F.R.S 364 



An Attempt to rectify the Inaccuracy of some Logarithmic Formulae. 

 By John Thomas Graves, Esq 365 



On the Reflection and Decomposition of Light at the separating Sur- 

 faces of Media of the same and of different refractive Powers. By 

 David Brewster, LL.D. F.R.S. L. & E 366 



On the Reduction to a Vacuum of the Vibrations of an Invariable Pen- 

 dulum. By Captain Edward Sabine, Sec. R.S 368 



Consideration of the Objections raised against the geometrical Repre- 

 sentation of the Square Roots of Negative Quantities. By the Rev. 

 John Warren, M.A 371 



Anatomical Description of the Foot of a Chinese Female. By Bransby 

 Blake Cooper, Esq 373 



