14 On (he Daltonian Theory of [July, 



Number of Weight of an 



atoms. integraut particle. 



255 Prochloride of phosphorus ... .1 ch -f- 1 p .... 6*241 e 



256 Perch loride of phosphorus . . . .2 ch + \ p 10'996 e 



257 Chloride of azote 4 ch + la.. .. 19*795 f 



258 Chloride of boron. Unknown. 



259 Chloride of carbon. Unknown. 



260 Chloride of potassium 1 ch + \ p .... 9*49S g 



261 Chloride of sodium 2 ch + Is 14-878 h 



262 Chloride of ammonium 1 ch + 1 am ... . 5*647 ' 



e The first of these is the liquid obtained by passing phosphorus 

 through corrosive sublimate. As it has never been analysed, the 

 composition is merely stated from analogy. The second is the white 

 powder obtained by burning phosphorus in a maximum of chlorine. 

 According to Davy, it is composed of 1 phosphorus + 6*8 chlorine. 

 This comes out nearly 2-i- chlorine + 1 phosphorus ; but 1 have 

 little doubt that the proportion of chlorine is over-rated, and that 

 it is really a compound of two atoms chlorine and one atom phos- 

 phorus. 



f This corresponds with the result of Davy's analysis, who found 

 the substance in question a compound of four volumes of chlorine 

 and one volume of azote ; but very little confidence can be placed 

 in the analysis. 



8 According to this statement the chloride of potassium (muriate 

 of potash) should be a compound of 100 chlorine + 111*15 potas- 

 sium. Now Dr. Wollaston gives us 100 chlorine + 111*337 from 

 the experiments of Klaproth ; and the analysis of Berzelius gives 

 us 100 chlorine + 1 12-48 potassium (Ann. de Chim. lxxix. 139). 

 Both of these results agree almost exactly with the numbers in the 

 table. 



h According to this statement, chloride of sodium (common salt) 

 ought to be composed of 100 chlorine + 62*05 sodium. Now Dr. 

 Wollaston gives us its composition from Davy, 100 chlorine + 

 65*986 sodium. Berzeljus's analysis makes it 100 chlorine + 

 66*869 sodium (Ann. de Chim. lxxix. 140). 



* From the properties of salammoniac there can be little doubt, 

 I think, that it is a compound of chlorine and ammonium. It is 

 not decomposed by heat, which is not the case with any other 

 ammoniacal salt. I ascertained long ago that muriate of ammonia 

 is composed of equal volumes of muriatic acid gas and ammoniacal 

 gas. Hence it consists of 



Muriatic acid 100 



Ammonia 46*178 



By weight 146*178 



