with the Nitric and Nitrous Acids. 3843 
_ 36.1 dissolved in water five grammes of subnitrite of lead, 
containing 
GIG. ain idiots boda cpl eet, 
BPBSE ait 0, mnie p) ach ate Lo 
WAKER cia: a'x cinn's's a wae 9: phe 
5:0000 
I passed a current of carbonic acid into the solution, and I 
separated 3°18 gr. of oxide in the state of carbonate*: there re-° 
mained therefore in the liquor 1-2950 gr. of oxide, and 0°4917 
gr. of acid, or 
ON ae ele ciat oi ay 4 etain) 400) 1D 
1s Es, a ae over (2°48 
Which differs by 2°78 from the determination made by calcu- 
lation. 
37. The solution precipitated by the carbonic acid was con- 
centrated, and there was an extrication of nitrous acid; and 
upon cooling, yellow leafy crystals of nitrite were deposited. 
The mother-water several times concentrated gave leafy nitrite 
to the last +. 
38. In order to determine what was the decomposition which 
the nitrite of lead would undergo by the carbonic acid, I took 
five grammes of nitrite (coming from the subnitrite) which con- 
tained 
BOD vaicins ban aas.sin ODE 
BISIAE 09: lao o.0' amo ae AOD 
ES a et a NS EB YS 
5-000 
The carbonic aeid precipitated 1-74 gr. of oxide. There re- 
mained therefore in the liquor 2:260 gr. of base and 0-887 of 
acid, or 
Reid ieleseie.. os y S2B-19 
Salle ery ye aoe) ee 
100-00 
which 
* T made two analyses of carbonate of lead coming from the nitrite de- 
composed by the carbonic acid gas, and obtained 
Acid if oe 16°36 .. 16°35 
Base... Pr 83°64 .. 83°65 
M. Berzelius found 
Acid oe He ae 16°50 
Base, ay ee oe ee 83°50 , 
+ Iset aside a portion of this mother-water, with a view to ascertain 
if the crystals which it should deposit by a very slow evaporation, 
would not contain more acid than those obtained by concentration and 
cooling. Iobtained in this way yellow crystals formed of leaves united 
Y 4 y in 
4 
