926 f General Notes. iai 
(called after W. T. Coleman) to a hydrous borate of calcium 
Southern California. It is described as possessing monoclinic 
thin, smooth and polished laminæ. Hardness 3,5 in the amor- 
phous to 4.25 in the crystalline variety. Specific gravity 2428. 
Colorless, transparent, sub-translucent to milky. Rather brittle, 
It decrepitates violently and then sinters in the blowpipe flame. 
Readily soluble in acid, giving abundant flakes of boracic acid. 
Admixtures of soda were found even in the clearest crystals. 
-= Disregarding the soda the composition is: 
xo CaO H,O 
[50.98] 27.18 21.84 == I00 
The formula 2CaO 3B,0, + 5H,O is deduced. 
It is closely allied to priceite and is perhaps identical with i. 
Analysis of the massive mineral are stated to give results closely 
agreeing with the formula of priceite. j aay 
6) Manganostibite (Igelstrom).—This mineral occurs at Nord- 
=- mark, Sweden, with other manganese minerals in primitive lime- 
stone (Laurentian). It occurs in small black grains, resembling l 
magnetite or hausmannite. It is compact with difficult cl be 
and with greasy luster. It is supposed to be orthorhombic. 2e 
fore the blowpipe it is infusible, and with carbonate of soda giv 
fumes of arsenic and antimony. Reactions for manganese ae 
readily obtained. It is perfectly soluble in chlorhydric acid, but 
in nitric acid gives insoluble oxide of antimony. - 
Composition 
Sb,0, As,O, MnO FeO CaO MgO en: 
24.09 7-44 55-77 5.00 4,02 30s ae 
Formula; 5MnO (Sb As), O; va | 
(7) Salmite? (Prost). — This is described as a eee els, " ; 
variety of chloritoid, occurring in irregular masses a ` E 
Belgium. Color gray; hardness 5-6 ; specific gravity 33 
Composition : 
SiO AlO, Fe,0,, FeO MnO CoO MgO CaO H,O 
19-14 33.66 3.38 13.05 7.14 0.04 1.79 ogo 6.32 15+ for 
(8) Utahitë (Damour)—Damour has proposed this nal 
a hydrous basic sulphate of peroxide of iron, which the mines 
minute hexagonal crystals of micaceous structure 1N ere take 
of Eureka Hill, Juab county, Utah. The specie. A ut 
to France by Ochsenius, and first described Ra: se 
amour, The crystals of this miner’) | i 0 
aye 
ea = 
named by Dam be 
yellowish-brown color and so small as hardly to 
1 Bull, Soc. Min. de France, vil, 1884, p. 120. 
? Geolog. Soc. Belge. 
* Bull. Soc. Min. de France, vil, 1884, p. 126. 
