72 
Magnetites : Magnetic iron ore. Magnetic iron sand. 
Hematites: Red hematite, red ochre, specular hematite, mi- 
caceous hematite, martite, needle ore, kidney ore. 
Limonites: Brown hematite, yellow ochre, pipe ore, bomb 
ore, bog ore. 
Siderites : Spathic ore, clay iron stone, black band ore. 
Opposite the wall cases of iron ores, two floor cases contain 
larger specimens of various ores of which the magnetic ores and 
hematites of Sweden are especially noteworthy. 
The visitor should now proceed along the center of the 
hall and examine the large specimens showing the appearance 
of large masses of ore as actually met with in the mines. 
The first specimen is a mass of zinc ore (smithsonite), 
weighing 5 tons, from Marion Co., Arkansas, showing botryoi- 
dal forms not unusual in ores which are like this, of secondary 
origin. 
Passing this, the tall case to the left contains bornite, a 
copper ore from Griqualand, South Africa. The iridescent tarn- 
ish which characterizes this ore is exceptionally well shown in 
this specimen. 
To the right stands another tall case containing a mass of 
red hematite from the Hart mines, Laramie Co., Wyoming, 
one of the most largely used of Western iron ores. 
Passing these two cases a case standing in the exact center 
of the Hall is next encountered. This contains a collection of 
the green and blue copper ores, malachite and azurite, from the 
Copper Queen Mine of Bisbee, Arizona, a locality which has 
long been famed for the beauty of its ores. 
Beyond this are two cases, of which the one to the left 
contains a large block of lead-zinc ore from Laurium, Greece, 
while that to the right contains the green nickel and magnesia 
silicate, garnierite, the well known nickel ore from New Cale- 
donia. 
Passing these, the last spec'men, directly opposite the en- 
trance of Hall 63, is a mass of nickel and copper ore weighing 
six tons, taken from 175 feet below ground in the third level of 
me Stobie Mine, Sudbury, Ontario. 
