27 



Memoires sur les Questions proposees par l'Academie Royale des 



Sciences et Belles-Lettres de Bruxelles, qui ont remporte les Prix 



en 1822-3. Tome IV. 4-to. 



en 1824-5. Tome V. 4to. 



en 1826-7. Tome VI. 4to. 



■ en 1828. Tome VII. 4to. — The Academy. 



Correspondance Mathematique et Physique, publiee par A. Que- 



telet. Tome V. 8vo. 

 ■ Livraisons 1 a 6 de Tome VI. 8vo. — Professor Que- 



telet. 



The reading of a Paper, entitled, " On a New Combination of 

 Chlorine and Nitrous Gas." By Edmund Davy, Esq. F.R.S. M.R.I. A. 

 Professor of Chemistry to the Royal Dublin Society. Communicated 

 in a Letter to Davies Gilbert, Esq. late President of the Royal So- 

 ciety j — was commenced. 



February 17. 



DAVIES GILBERT, Esq. V.P., in the Chair. 



The following Presents were received, and thanks ordered for 

 them : — 



A Manual of Analytical Chemistry. By Henry Rose, Professor of 

 Chemistry at Berlin. Translated from the German by John 

 Griffin. 8vo. — Presented by the Publishers. 



Tables of Life Contingencies. By Griffith Davies, Esq. 8vo. — 



The Author. 



Caii Plinii Secundi Libri de Animalibus cum Notis Variorum, cu- 

 rante J. B. F. S. Ajasson de Grandsagne. Notas et Excursus 

 Zoologici Argumenti adjecit G. Cuvier. 8vo. — The Editors. 



Apercu d'un Ouvrage Analytique. Par M. Decajeul. 8vo. — The 

 Author. 



The reading of Professor Davy's Paper was resumed and con- 

 cluded. 



In the course of his experiments on a new test for chlorine gas, an 

 account of which was lately read to the Royal Society, the author 

 was induced to examine the gases produced by the mutual action of 

 nitric acid and different chlorides, and also of the nitric and muriatic 

 acids on each other. When fused chloride of sodium, potassium or 

 calcium, in powder, is treated with as much strong nitric acid as is 

 sufficient to wet it, a considerable action takes place : cold is pro- 

 duced, and a gas of a bright reddish or yellowish colour is copiously 

 evolved, which is promoted by applying a gentle heat. This gas, 

 especially in the early stage of the process, appears to be a mixture 

 of chlorine and another gas, distinguished from it by the great fa- 

 cility with which it is absorbed by water. From this circumstance, 

 and from its also exerting a considerable action upon mercury, its 

 properties cannot be satisfactorily ascertained by collecting it in con- 



c2 



