THE COLLECTION OF MINERALS 
too large for the desk cases, but the arrangement in the two series 
is the same. The systematic series in the desk cases is naturally 
far more complete than that in the wall cases. The specimens 
are arranged in accordance with the classification given in the 
sixth edition of Dana’s System of Mineralogy, and the series in 
the desk cases begins at the left of the entrance to Hall A. It is 
intended to be studied from left to right along each side of every 
case, so that one advances from west to east along the south side 
of the hall, enters the small hall, B, and returns along the north 
side of the large hall to the end of the series at Case 25. Case 27 
contains a collection of the minerals of New York and vicinity, 
and Cases 27 and 28 contain introductory series presenting the 
chemical and physical features of minerals, together with ex- 
planatory tables and photographs. The meteorites of the collec- 
tion are now to be found in Cases 25 and 27, but they are soon 
to be arranged by themselves in cases along the center of the 
hall. At the head of every scientific subdivision will be found 
a statement, called here a “Rubric,” detailing the principal 
members of the group, and giving their chemical composition 
and system of crystallization. 
In the Museum collection the Sulphurs, Golds and Coppers 
are the most striking examples of the Native Elements. 
The Sulphur specimens (see Desk Case 1 and Wall Case A) 
arrest attention on account of their beauty and perfect preserva- 
tion. The crystallographic habit of the mineral is well known, 
steep pyramids beveled by the narrow planes of more obtuse 
pyramids, generally broad basal pinacoids, prisms, domes, hemi- 
pyramids and frequent sphenoids. An examination of the 
crystals will generally reveal upon the large brilliant faces curi- 
ously wrinkled and clouded surfaces which, under a magnifying 
glass, show densely crowded pits and irregular etchings. The 
sulphur deposits of the earth usually are found in connection 
with gypsum beds or near active or extinct volcanoes. The sul- 
phur has been produced by separation from sulphuretted hy- 
drogen. The mineral is found in large deposits in Wyoming, 
Nevada, southern Utah, and California. 
Particularly choice are the specimens of Gold. The mineral is 
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