30 FIELD MUSEUM OF NATURAL lilSTORY 
Halls 63 and 64. 
SYSTEMATIC MINERALOGY 
This collection numbers about 15,000 specimens and illus- 
trates the different species of minerals obtained from various 
localities of the world. The arrangement is in accordance with 
the system of Dana in the following order: Elements, sul- 
phides, chlorides, fluorides, oxides, carbonates, silicates, phos- 
phates, sulphates and hydrocarbons. The smaller specimens 
are placed in the floor cases, the larger in the wall cases. The 
series begins with the elements at the left of the entrance from 
Hall 62, then follows down this side of the hall and up the other 
and then passes to Hall 64. The order is also indicated on each 
specimen by the number placed at the left on its label. This 
shows its number in Dana’s system. The specimen labels show 
the name and composition of the species, the Museum catalogue 
number, and the locality. Beginning with the case of elements 
at the left of the entrance from Hall 62, the specimens of native 
sulphur are remarkable for their size and brilliancy and the large 
crystals of stibnite from Japan are also worthy of special note. 
The next wall case contains a remarkable specimen of millerite 
from Iowa, and a fine display of fluorite from Cumberland, Eng- 
land. In the floor cases in this group the specimens of gold, 
galena, pyrite, sylvanite and cerargyrite are especially noteworthy. 
Some of the minerals in this group, especially realgar and proust- 
ite are covered with black boxes in order to protect them from 
the fading effects of light. These boxes caii be raised, for 
examination of the specimens, by pressing a button placed un- 
der the edge of the case. 
In the floor cases following, the series of twin quartzes from 
Japan, of Placerville, California, quartzes, of golden quartz from 
Colorado, chalcedony from Wyoming, precious opal from Aus- 
tralia, cuprite from Arizona, hematite from Elba, manganite from 
Michigan, and rutile from Georgia, are noteworthy. The ad- 
joining wall cases contain among other specimens a large and fine 
series of quartz crystals from several localities, also a large 
group of amethyst from Thunder Bay, and a remarkable series 
of agates from South America. Passing to the east side of the 
hall a series of calcites of exceptional completeness and beauty 
is shown. These include a superb series of English calcites and 
