Ne 
; 
When acid of 1-43 sp. gr. was used the solution took place very 
Tapidly. The colorless solution evaporated at a very gentle 
heat let fall at first acicular crystals (HgCl), and dried up toa 
crystalline residue, which when treated with hot water dissolved 
i great part, leaving a small quantity of yellowish residue min- 
‘gled with som heavy black powder: ‘lhe solution contained 
ie upon. Nitric acid, whether concentrated or dilute, was 
und to be wholly inert, and after the most prolonged and re- 
chlorid was very finely pulverized, boiled for some time and 
€vaporated with acid of 1:43 sp. gr., the result was the same. In 
actly the heat decomposable by it.”+‘ A solution of chlorid of 
_ ad left, after one evaporation with excess of dilute nitric acid, 
: Precipitated chlorid was then digested with acid of 1°29 sp. gr. 
ae the Sand-bath, and was observed to change rapidly during 
os Speration into a granular crystalline powder. The acid hay- 
© been renewed several times until this change ap 
Plete, a little hot water was added, which dissolve 
: : ? a 
Without 
ed com- 
the whole 
nd the solution contained nothing but nitrate of lead, 
a trace of chlorid. The decomposition was surprisingly 
and complete, considering the insoluble character of the 
ance 
22. Silver—The action upon chlorid of lead being so power- 
fal, I was by no means led to anticipate the result obtained with 
2 “lorid of silyer. On the contrary, I certainly expected to ob- 
* Gm. Handbuch, iii, 520. + Ibid., i, 804. 
