1884.] ` Mineralogy. 621 
regards as a new species. Before the blowpipe it melts to a 
black, metallic glass. Soluble in acids. Composition: 
PO, FeO MnO CaO MgO 
32.82 16.12 14.86 14.91 17.42 
Berzeltite—Many rare minerals accompany the hausmannite of 
Sweden. Native lead, native copper, monimolite, atopite, gano- 
malite, chondroarsenite, hyalophane, ekdemite, hedyphane, braun- 
ite, manganophyllite, tephroite, manganosite, pyrochroite, man- 
— barylite, rhodonite are among the species found. 
e of the above are very questionable species. Recently 
Igelström? has observed the rare mineral berzeliite in the haus- 
mannite of Nordmark. It occurs both as a vein of a yellow 
Massive material, and disseminated in grains through veins of 
cite, 
Analysis of the pure yellow material gave: 
AsO; CaO MgO (with some MnO) Pband Cl 
57.80 25.25 16.95 traces 
The formula given by Dana (Mineralogy, p.544) is adopted. 
Another variety of berzeliite, found many years ago at Long- 
ban has the formula of an orthoarseniate and is singly refracting, 
while that now described is doubly refracting. The physical 
characters of the two minerals are identical. 
M. E. Bertrand? has made an optical examination of the two 
varieties of berzeliite, and finds that while thè optical characters 
Ssectrix 
belongs, 
line momalite—M. Sjögren’ has examined the silicate of lead and 
©, to which Nordenskiöld has given the name ganomalite. He 
Wo analyses are oj ; 3 
given, the first of the variety from Longban, 
the second of that from Jacobsberg : 
SiO? o QO. MO — Gangi 
PRAN 69.42 9.89 0.29 
N 18.33 68.80 9.34 2.29 1.24 ; 
port Ve i tly been 
found ~Very small crystals of tephroite have recently 
: at Longban. A crystallographic investigation has shown 
: n 
that all the forms are those known in chrysolite, and that, as 
i 
i Ball. Soc, Min. de France, 1884, p. 29- 
at., p. 31 
2 ™ . 
Geol, Foren. d. Stockholm, 1883. 
