ON THE PRUSSIC AND PRU550US ACIDS. 



347 



The liquid Avas evaporated by a gentle heat to dryness ; Thi. clis^olTcd 

 upon the saline residuum alcohol was poured, till it ceased to"^ alcohol, 

 extract any thing; by this means the whole of the sulphite divness/ancT 

 and sulphate of potash was left behind, and the alcohol'"''.*^'^''''''-''*''* 

 >vhen filtered held in solution that part only, which had the 

 red tingeing property with solutions of iron. The alcoliol 

 tras now got rid of by distillation, and the salt it left in the. 

 retort was redissolved in water. This solution (B)gavethe 

 following results with the different metallic solutions. 



TABLE II. with Liquid B. 



METALLIC SOLUTIONS. 



Nitromuriate of platina 



Muriate of gold 



Nitrate of silver 



Sulphate of silver - 

 ^' itrate of mercury 

 ( Kxinitrate of mercury 

 Nitrate of lead 

 Oxinitrate of lead 

 Superacetate of lead 

 Hyperoximuriate of lead 

 Supersulphate of copper 

 Muriate of tin 

 Muriate of bismuth 

 Saiphate of iron 

 Oxisulphate of iron 



Oxisulphate of manganese 

 Sulphate of Zinc 

 Nitromuriate of cobalt 

 Nitrate of nickel 



EFFECTS. Action of me- 



. ., tallic salts on 



CA precipitate smiilar to that in this solution. 

 A Table I, but in a snialler quantity, 

 ' and longer in forming. 

 5 Light olive precipitate, some gold 

 L reduced. 



5 A grayish white precipitate, not 

 ( changing colour. 



A clear white precipitate. 



A copious white precipitate. 



A white precipitate in small quantitv. 



No precipitate. 



No precipitate. 



No precipitate. 



A slight white precipitate. 



A dull v^hite precipitate. 



No precipitate. 



No precipitate. 



No change. 



Same as Table L 

 5 The eriijison colour disappears ; no 

 c precipitate. 



No change. 



No precipitate. 



No change. 



It is necessary to remark, that in (he preceding Tabic, as The solution a 



well as in Table I, several of the nitrates and muriates werc!'*''^' •■wW«'n<-<i 

 ,.,,,,,., , , liy sotnc of th< 



Slightly reddened, though not in a degree to be compared nitirit.s and 



with the oxisulphate of iron. I have not noticed this in '""^i^tes, 

 the table, because I am not certain, whether this effect was 

 not owing to a minute j)ortion of oxide of iron, which might 

 have been introduced into those solutions by the acids em- 

 ployed to make them, as both the nitric and muriatic acids 

 of commerce generally contain some; an excess of nitric 



acid. 



