120 Scientific Intelligence. 
tion combined with sodium and alumina probably gives the rich blue 
color to the mineral. The analysis differs essentially from that in Pog: 
gendorf’s Annalen, xlvii, p. 179, in the occurrence of sulphur and sul- 
phuric acid in place of carbonic acid. Dr. Jackson consequently 
analyzed a specimen of the foreign mineral so far as to ascertain that no 
carbonic acid exists in it, and that it does contain sulphur and sulphuric 
acid. 
The crystals of Zircon are short prisms, sometimes highly modified. 
One crystal found by Mr. Stacy, was a little more than one inch in di- 
ameter. 
37. Iberite, a new mineral from Montalvan, province of Toledo, 
Spain ; by E. C. Nortin, (Bib. Univ. Geneva, July, 1845, p. 375; from 
Compt. Rend. Acad. Stockholm.)—This mineral occurs in large hex- 
agonal prisms and is near Gigantolite. It has both lateral and a basal 
cleavage ; hardness 2°5; specific gravity 2°89; fracture scaly ; color 
pale grayish-green ; opaque, with a lustre between pearly and vitreous. 
Exposed to the blowpipe it melts at a strong heat and fuses perfectly 
into a glass; and in a tube it gives off water. Composition, according 
to M. Nor1iy, silica 40-901, alumina 30°741, protoxyd of iron 15-467, 
potash 4'571, soda 0-043, protoxyd of manganese 1°327, lime 0°397, 
magnesia 0-806, water 5-567—99-820 ; from this he deduces the formula 
(Fe, K)? SitAl? Si+-sz, 
Amphodelite has the same formula, exclusive of the water. 
38. Damourite, a new mineral, by M. Detesse, (L’Institut, No. 605.) 
—Damourite is a hydrosilicate of alumina, having the formula, accord- 
eee gee 
40, Native Lead.—Native lead has been detected in the carbonifer- 
ous limestone near Kenmar, County of Kerry, Ireland. It occurs in 
grains in crevices in the rock, and fragments weighing half an ounce 
are said to have been obtained. This mineral is said also to occur in 
_ the chain of Luquillo, at Porto Rico, 
Al. Crystallization of Sulphuret of Cadmium and Perowskite ; by 
ESCLOISEAUX, (Ann. de Chim. et de Phys., xiii, 1845.)—The form 
i hexagonal prism terminating in the faces of one or more six-sided 
amids, and witha truncate summit. Drscnorseavx has determined 
