00 P«.ETENDED NEW METAL J PALLADIUM. 



Su'phuric add ' Sulphuric acid, boiled upon palladium, acquires a beautiful 



Wea^ic a€tiort :* f^d cbiour, and diflolves a portion of the fubftance. The 



beautiful red adlion of (his add is not very powerful, and, upon the whole, 



ution. j^ cannot be looked upon as a good folvent for palladium. 



Nitric add more Nitric acid a6ls with much greater violence upon palladium. 



aftivei fuic jcd jt oxidizes the fubftance with fomewhat more difficulty than it 

 foluuon. . "' 



can oxidize filver; and, by diffolving the oxide, forms a very 



beautiful red folution. If the nitric acid be impregnated with 



nitrous gas, its adion upon palladium is much more rapid. 



Muriatic add. Muriatic acid, by being boiled upon palladium for a confi- 



Red folution. derable time, a6ls upon it, and becomes of a beautiful red. 



Nltro-muriatic But the true folventof palladium is nitro-muriaticacid, which 



acid IS the true attacks it with great violence, and forms a beautiful red 

 folvent. _ , . ^ 



lolution. 



precipitate from Ffom all the fe acid folutions of palladium, a precipitate 

 acids by alkalis jnay be produced by the alcalis and earths. Thefe precipitates 

 orange pitly re- ^^^> ^^^ ^^® "^^^ P^"*** ^^ ^ beautiful oraftge ; are partly re- 

 diflblTcd. diffolved by fome of the alcalis ; and the fupernatant liquor 



of the precipitate formed by ammonia is fometimes of a fine 

 greenilh blue. Sulphate, nitrate, and muriate, of potafli, or 

 of ammonia, produce an orange precipitate in the falts of 

 palladium, as in thofe of platina, when not in too dilute 

 folution; and the precipitates from the nitrate of palladium 

 are in general of a deeper orange. All the metals, except 

 gold, platina, and filver, caufe very copious precipitates in 

 folutions of palladium. Recent muriate of tin produces a dark 

 orange or brown precipitate in neutralized falts of palladium, 

 and is an extremely delicate tefl. Green fulphate of iron 

 precipitates palladium in the metallic Hate ; and, if the ex- 

 periment fucceed, the precipitate is about equal in weight to 

 the palladium employed. Prufliate of potafli caufes an olive- 

 coloured precipitate ; and water impregnated with fulphurette^l 

 hidrogen gas, a dark brown one. Fluoric, arfenic, phof- 

 phoric, oxalic, tartaric^ citric, and fome other acjds, together 

 with tiieir (alts, precipitate fome of the folutions of palladium, 

 and form various combinations with this fubftance. 



Such are the principal characters I have found in palladium, 

 examined as a fimple metallic body. It does not appear that, 

 in dating any of its properties, except its fpecific gravity, the 

 printed notice has been guilty of mifreprefenlation. 



From 



