342 On the Combinations of the yellow Oxide of Lead 
As it may reasonably be supposed that a little acid might 
have been volatilized when the nitrite was dried, I distilled a 
certain quantity of this salt dried in the sun, in a small retort 
communicating with a tube filled with muriate of lime: the re- 
sult was conformable to that of the preceding analysis ; deducting 
the water only, the quantity of base was a little more than in 
this analysis. 
32. 100 parts of subnitrite which had been exposed to the 
sun, and at a temperature of 100° (centigrade), lost by heat 10°5 
of acid and water. The same salt dried in the sand-bath with 
great care yielded Acid....... Sota s wah oiee 100 
Le RAE ASP es a. 90-1 910 
33. The analysis of nitrites of lead proves that in the sub- 
nitrite the base is double that of the nitrite ; for, if we multiply 
by two 450, which is the quantity of oxide found in the nitrite, 
we have 900: and in the analysis of the subnitrite we found 910. 
34. In the sulphites and alkaline nitrites we know that the 
base is in the same proportion with the radical of the acid, as 
in the sulphates and the nitrates of the same bases ; so that if we 
take away, for example, from the sulphate and nitrate of potash, 
the quantity of oxygen which forms the difference between the 
sulphuric and the sulphurows acid, and between the nitric and 
the nitrous acid, we ought to have sulphite and nitrite at the 
same degree of saturation with the salts from which they pro- . 
ceed. The same appears to be the case with the nitrate and 
nitrite of lead. We may judge of this if we convert the acid 
of the nitrate into nitrous acid. According to M. G. Lussac, 
100 parts of nitric acid contained 88-208 of nitrous acid. If 
what we have said be exact, the nitrite ought to be formed of _ 
ft a .». 88203 17°85 
Oxide.) 4 toe o. 406-000 82°15 
494-203 100-000 
Now if we compare this proportion with that found by 
analysis, we shall see that the difference is only 30 centiemes of 
one part in a hundred. 
35. I wished to know if there was a nitrite of lead corre- 
sponding to the acid nitrate; and I thought that, if this salt ex- 
isted, I ought to find it in the solution of nitrites precipitated 
_ py the carbonic acid; for 1 have said a little higher, that this 
liquor contained oxide of lead and nitrous acid in excess: I cal- 
culated in the first place the proportion, and I found that it must 
be formed, supposing that it existed, of 
BRS BOG 5: ae altneieyee OSU 30:3 
Oxide ..........- 203-000 69-7 
au208 | 1000 
i 36. I 
