42 
SALOOtf* compact brown iron stone, and brown hematite, 
^t. Hist, together with several varieties of argillaceous or 
clay ironstone, such as common, columnar, pisi- 
form, reniform clay iron stone, meadow ore, &c. 
* — Spathose iron ore, or carbonate of iron, the pri- 
mitive form of which has lately been ascertained, 
by Dr. Wollaston, to be different from that of 
carbonate of lime : crystallized, massive, in com- 
bination with other substances. 
{Case 36.) Contains the remaining ores of iron 
and those of manganese, a metal which stands in 
close geognostical relation with iron.- — Arseniate 
of iron, which occurs only crystallized, chiefly in 
cubes, whence Werner's name of cube ore. — 
Chromate of iron, among the specimens of which 
is one from Baltimore, in which this substance is 
intermixed with talc coloured purple by chromic 
acid. — Phosphate of iron : among the specimens 
here preserved, which belong to the blue iron 
earth of Werner, (supposed by some to be 
native Prussian blue,) are, the massive variety 
from New Jersey, and several pulverulent varie- 
ties, in clay, wood, peat, &c. — With these is 
placed, provisionally, the turquois, a gem which 
has lately been considered, by Bouillon la Grange, 
as bone penetrated by phosphate of iron : the 
genuine turquois, however, from Chorazan, in 
Persia, where it occurs in nodules like the one 
here 
