226 RECORD OF THE ROYAL SOCIETY 



1804. Samuel Vince. 



' Observations on the Hypotheses which have been assumed to account for 

 the cause of Gravitation from Mechanical Principles.' 



Journal Book, vol. xxxviii, p. 334. 



1805. William Hyde Wollaston. 



< On the Force of Percussion.' Phil. Trans. , 1806. 



1806. Sir Humphry Davy, Bart. 



On some Chemical Agencies of Electricity.' Phil. Trans., 1807. 



1807. Sir Humphry Davy, Bart. 



' On some new Phenomena of Chemical Changes produced by Electricity, 

 particularly the Decomposition of the fixed Alkalies, and the Exhibition of 

 the new Substances which constitute their Bases.' Phil. Trans., 1808. 



1808. Sir Humphry Davy, Bart. 



' An Account of some new Analytical Researches on the Nature of certain 

 Bodies, particularly the Alkalies, Phosphorus, Sulphur, Carbonaceous Matter, 

 and the Acids hitherto undecompounded ; with some general Observations 

 on Chemical Theory.' Phil. Trans., 1809, pp. 39, 450. 



1809. Sir Humphry Davy, Bart. 



' On some new Electro-Chemical Researches, on various objects, particularly 

 the Metallic Bodies from the Alkalies and Earths ; and on some Combinations 

 of Hydrogen. ' Phil. Trans. , 1810. 



1810. Sir Humphry Davy, Bart. 



' On some of the Combinations of Oxymuriatic Gas and Oxygen, and on the 

 Chemical Relations of these Principles to Inflammable Bodies.' 



Phil. Trans., 1811. 



1811. Sir Humphry Davy, Bart. (?) 



1812. William Hyde Wollaston. 



' On the Elementary Particles of certain Crystals.' Phil. Trans., 1813. 



1813. William Thomas Brande. 



' On some new Electro-Chemical Phenomena.' Phil. Trans., 1814. 



1814 to 1818. No record. 



1819. William Thomas Brande. 



' On the Composition and Analysis of the inflammable Gaseous Compounds 

 resulting from the destructive Distillation of Coal and Oil ; with some 

 Remarks on their relative heating and illuminating power.' 



Phil. Trans., 1820. 



1820. Captain Henry Kater. 



' On the best kind of Steel, and form, for a Compass Needle.' 



Phil. Trans., 1821. 



1821. Captain Edward Sabine. 



'An Account of Experiments to determine the Amount of the Dip of the 

 Magnet* Needle in London, in August 1821 ; with Remarks on the 

 uments which are usually employed in such determinations.' 



Phil. Trans., 1822. 



1 822. No record. 



