2. An Account of some Experiments and Observations on the constituent parts of certain Astringent Vegetables, and on their operation in Tanning. _February 24, 1803._ 3. An Account of some Analytical Experiments on a Mineral Production from Devonshire, consisting principally of Alumina and Water. _February 28, 1805._ 4. On a Method of analysing Stones containing a fixed Alkali, by means of Boracic acid. _May 16, 1805_. * _For the above papers, the Society awarded him the Copley Medal._ 5. THE BAKERIAN LECTURE.--On some Chemical agencies of Electricity. _November 20, 1806._ ** _For this memoir, he received the prize of the French Institute._ 6. THE BAKERIAN LECTURE.--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; and on the general nature of Alkaline bodies. 3? _Read November 19, 1807._ 7. Electro-chemical Researches on the Decomposition of the Earths; with Observations on the Metals obtained from the Alkaline Earths; and on the Amalgam procured from Ammonia. _June 30, 1808._ 8. THE BAKERIAN LECTURE.--An Account of some new Analytical Researches on the nature of certain bodies, particularly the Alkalies, Phosphorus, Sulphur, Carbonaceous matter, and the Acids hitherto uncompounded; with some general Observations on Chemical Theory. _December 15, 1808._ 9. New Analytical Researches on the nature of certain bodies; being an Appendix to the Bakerian Lecture for 1808. _February 1809._ 10. THE BAKERIAN LECTURE FOR 1809. On some new Electro-chemical Researches on various objects, particularly the metallic bodies from the Alkalies and Earths; and on some combinations of Hydrogen. _November 16, 1809._ 11. Researches on the Oxy-muriatic Acid, its nature and combinations; and on the elements of Muriatic Acid; with some Experiments on Sulphur and Phosphorus, made in the Laboratory of the Royal Institution. _Read July 12, 1810._ 12. THE BAKERIAN LECTURE FOR 1810. On some of the Combinations of Oxy-muriatic Gas and Oxygen, and on the chemical relations of those principles to inflammable bodies. _November 15, 1810._ 13. On a Combination of Oxy-muriatic Gas and Oxygen Gas. _February 21, 1811._ 14. On some Combinations of Phosphorus and Sulphur, and on some other subjects of Chemical Enquiry. _June 18, 1812._ 15. On a new Detonating Compound; in a letter to Sir Joseph Banks, Bart. F.R.S. _November 5, 1812._ 16. Some further Observations on a new Detonating substance. _July 1, 1813._ 17. Some Experiments and Observations on the Substances produced in different chemical processes on Fluor Spar. _July 8, 1813._