MINERALS. 243 
Another nickel-iron sulphide, from the Worthington mine, Sault branch of the 
Canadian Pacific Railway, 25 miles west of Sudbury, has been analyzed by W. F. 
Hillebrand. Grayish, with a cast of yellow. Not pyrrhotite. Possibly a mixture 
of polydymite and pyrite. 
Still another nickel-iron sulphide is described by Hillebrand in Jour. Am. Chem. 
Soc., vol. 29, p. 1027. It is found in association with the patronite of Minasragra, Peru, 
and appears to be a new species with the formula (NiFe)8,. For this the provisional 
name bravoite is suggested. Analysis by Hillebrand. The deficiency is possibly 
due to the partial oxidation of the vanadium present. The latter represents unsepa- 
‘rated patronite. 
STROMEYERITE. 
From the Silver King mine, Calico, San Bernandino County, California. Sp. gr., 
SULPHIDE OF SILVER, COPPER, AND ZINC. 
Massive, resembling bornite. Apparently homogeneous, but may be a mixture. 
Sp. gr., 5.407 at 20°. Analyzed by W. F. Hillebrand and described in Bull. 55. 
From the Gagnon mine, Butte, Montana. 
aCalculated to saturate CaO. b Partly from H of carbonaceous matter. 
cIncludes a little P23. 
