On the Prnssic and Prussous Acids. 

 Table III. with Prussous Acid. 



203 



Chemical Agents, 



Effects. 



Muriate lime , 



Muriate barytes ..... 



Muriate gold , 



Sulphate silver. . . .1 

 Nitrate silver . . . ,j 

 Prussiate mercury . . , 

 Nitrate mercury .... 

 Oxy-nitrate mercury . 



Oxy-sulphate iron ... 



Nitro- muriate platina 

 Nitrate lead , 



Oxy-nitrate lead 



Hyper-oxy muriate lead 



Super-sulphate copper 

 Muriate bismuth . .^ 

 Nitrate nickel 

 Muriate tin . . 

 Nitrate cobalt. •„• . . )■ 

 Sulphate iron . 

 Sulphate manganese 

 Sulphate zinc . 



J 



No change. ' 



No change. 



The gold precipitated metallic. 



Copious white precipitates. 



No change. 



Copious grayish white precipitate. 



Very slight precipitate white, 



{Solution turns blood-red. No 

 precipitate. 

 No precipitate. 

 No change, 

 f Solution becomes red, but hardly 

 any precipitate formed, unless 

 heated, in which case a copious 

 white precipitate ensues. The 

 ^ red colour disappears, a rapid 

 action takes place between the 

 two liquids, and some of the 

 nitric acid of the solution is de- 

 composed, 

 f A slight precipitate, probably of 

 \ muriate of lead. 

 Solution becomes slightly turbid. 



No precipitates. 



I cannot conclude this part of* my memoir without giv- 

 ing a more simple and expeditious process for preparing 

 prussite of potash, than that which I at first discovered. 



It is the following : 



Pour a solution of prussiate of mercury into hydrogu- 

 retted sulphuret of potash, till the mutual decomposition 

 of the two liquids is completed ; prussite of potash is in- 

 stantly formed, and may be separated by filtration from the 

 solid combination of the sulphur and mercury. 



I wish 



