CONTENTS. 



XXX. On the Decomposition of Light into its most simpls 

 Elements, being Part of a IVork upon Colours. By 

 C. A. Prieur, late a Colonel in the Corps of Engineers 



Page 210 



XXXT. The Bakerian Lecture, on some Chemical Jgencies 

 of Electriciti/. By Humphrv Daw, Esq. F. R. S. 

 M.R.I.A ,220^ 



XXXI [. History of Astronomy for the Year 1806. By 

 Jero:.ik DE Lalaxdh 234 



XXXni. On the Alkalies of Commerce, and on the least ex- 

 pensive Process for ascertaining their commercial Value by 

 Means of the Instrument caUed the Alkali-meter. Read 

 to the Academy of Rouen, 5 Thermidor, An. 13, by 

 M. T) ESCRoiziLLT-S senior 244 



XXXIV. Report made to the Class of Physics and Mathe- 

 matics of the Institute of France, upon a Proposition made 

 by M. Six, Chief Director of the Fire- Engines of Paris, 



for substituting JFafcr saturated with Sea Salt instead of 

 common Water, for extinguishing Fires. By Messrs. 



Chaptal 0«fZ MOXGE 25<?t 



XXXV. Report of Surgical Cases in the City Dispensary^ 

 Grocers- Hall- Court, Poultry, from the Beginning of 

 March to the Eiul of June 1S07; loith Remarks on the 

 Propriety of establishing a Fund for the Relief of the 

 Ruptured Poor. £y John Taunton, Esq. .. 256 



XXXVI. Additional Memoir upon living and fossil Ele- 

 phants. By M. CuviER 258 



XXXV'II. Notices respecting New Books .. .. 265 



XXXVIII. Proceedings of Learned Societies .. ,. 2/8 



XXXIX. Intelligence and Miscellaneous Articles .. 284, 

 XL. Facts for a ^History of the Gallic Acid. By M. Bouil- 



lon-Lagraxge 28Q 



XLI. Extract of a Memoir upon two muv Classes of Gal- 

 vanic Conductors. By M. Ekman. of Berlin . . 907 



XLI I. On the Musical Temperament of Keyed Instruments. 

 ii// William Uawkes, Esq. .. '. 304 



XLI II. On the Discovery of the Fluoric Acid in the Enamel 

 of Human Teeth; on Tantalite and Yttro-tanfalite ; on 

 Cerium ; and on the Production of the Muriatic Acid 

 by Means of Galvanism. Extracted from a Letter of 

 M. Bkrzklius to M. Vaitquixin 3m6 



XLIV. Thirty fifth Communication froin Dr. 'i"ik)hnto.v, 

 relative to Pneumatic Medicine 308 



XT.A'. On the Alkalies of Commerce, and on the least ex- 

 pensive Process for ascertaining their commercial falue by 

 Means of the Instrument culled the yllkuli- meter. Read 

 8 to 



