_ és 
342 Researches on Nalis. 
the same base, so IT have been unable to obtain more than two sub- 
salts; and if it isa of sesqui-salts, of bi-salts, of tri-salts, of. 
quadri-salts with water of constitution, my experiments also show 
that the same relations, only reversed, exist in the basic salts, so 
that we have subsalts, sesqui-metallic, bi-metallic, tri-metallic and 
quadri-metallic, with the same water of constitution as in the cor- 
responding acid salts. 
In my view, the subsalts are neutral salts of a particular type, 
4 as truly as the metaphosphates and the pyrophosphates. ‘The 
: — — are called ’tribasic are nothing but subsalts, and 
there is the same relation between an ordinary phosphate and a 
ieotecliepbatesn as between a subnitrate and a nitrate. The dif- 
ference is * mont in their relative stability. We give the fol- 
owing as 
On ae senisal chromate of potash to neutral nitrate of 
jae ad, we obtain a canary-yellow precipitate of chromate of lead ; 
on the contrary, we pour the same neutral chromate into the 
- of fi oo acids ; but 
will confine myself to stating the following facts, which a are in 
er, i. e. 5°2 per cent., so as to con- 
*H)=P? 0+,3Na? O, H? 0 
te 
ze 
oe 
= 
fe) 
2, 
fe) 
— 
=) 
a 
ag 
(=) 
5 
74 
na 
> 
a>) 
ie) 
7 
oO 
| 
> 
° 
= 
=r 
S 
ae 
a 
= 
° 
- 
an ides, the fact I cite is not isola- 
tee the tribasic hese of barytes and the tribasic phosphate 
f lime retain also the elements of water as high as 392° F. And 
iideed, except the phosphase7 of lead and that of a I hee 
od aot solutions should be used, for the subnitrate of lead is almost insoluble in in 
the 
