296 On the DsltoniaJi Theory of [Oct. 



Number of Weight of an 

 atoms. integrant particle. 



178. Sulphate of potash-and-\ 2 17-I42 m 

 ammonia J * 



179. Sulphate of potash-andO ■ , + g ^i 

 magnesia J ' 



180. Sulphate of soda-and-") „ , , , _ -„„**«« 



r - 5-75+1 50 + 6 a 57*616 ° 



ammonia J 



181. Sulphate of soda-andO . , '« , „ ^.o^od 



" > 4 5 + 1 so + 3 to 42-868 p 



magnesia J 



182. Sulphate of magnesia- 1 . , n , . «™ .- 00 

 ! r . ° 5-35+2??*+ la 20*878 q 



anu-amnionia J 



183. Supersulphate of copper 2 s + 1 c 20 '000 r 



added together constitute the atoms given in the table: so that 

 if the preceding analysis be correct, this is the most complicated 

 salt known. 



m I conceive the triple salts to be formed by the union of an 

 integrant particle of one salt with an integrant particle of 

 another. r l he present salt consists of an atom of sulphate of 

 potash united with an atom of sulphate of ammonia. If this 

 be correct it should contain 60 parts sulphate of potash and 

 33*5 sulphate of ammonia. According to Link, it contains 60 

 sulphate of potash and 40 sulphate of ammonia. No great 

 difference, if we consider the difficult}' of the analysis. 



n According to Link, this salt contains 3 parts of sulphate of 

 potash and 4 parts of sulphate of magnesia. Hence it consists 

 of 1 atom sulphate of potash and 2 atoms sulphate of magnesia. 



° According to Link, this salt consists of 5 parts sulphate of 

 soda and 9 parts of sulphate of ammonia. If so it is a com- 

 pound of 1 atom sulphate of soda and 6 atoms sulphate of 

 ammonia. 



f According to Link, this salt consists of 5 parts of sulphate 

 of soda and 6 parts of sulphate of magnesia. If so it must be 

 a compound of 1 atom of sulphate of soda and 3 atoms of sul- 

 phate of magnesia. 



q According to Fourcroy, this salt is composed of 68 parts 

 of sulphate of magnesia and 32 parts of sulphate of ammonia. 

 If so it must be a compound of 2 atoms of sulphate of magnesia 

 and 1 atom of sulphate of ammonia. 



r As an atom of sulphuric acid weighs 5, and an atom of 

 peroxide of copper weighs 10, this salt ought to be composed of 

 equal weights of acid and base. Now according to Proust it 

 consists ot 33 acid + 32 oxide; according to Berzelius, of 49*1 



