in reality the anhydrous pernitrate of iron with a slight admix- 
ture of the cubic nitrate. For he did not obtain it in well de- 
35° C.; but his product contained a little free acid and it is prob- 
an that the pure tetrahydrate melts at a point between 35° 
and 40° 
If six equivalents of water are added to the melted cubic ni- 
deta heat is evolved, and, after a while, the whole becomes 
solic 
the two chlorids is slow! y heated, the transparent crystals liquefy 
‘ first. The addition of six equivalents of water to the melte 
The plan of using fuming nitric acid to contend with a hy- 
. 
rated nitrate for the possession of water, of course admits of | 
which appeared to the eye dimetric, being indeed 
Tt remains then still uncertain 
iron is a salt 
hever expect to get it in the solid state except as a sexhydrate. 
Protonitrate of Iron—The most convenient way of procuring 
PY sn is a salt of such a nature that we can _ 
a 
J, M. Ordway on Nitrates of Iron. 329 
ele 
