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REPORT OF NEW JERSEY 81 ATE ME SLUM. 
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Ltilo (*«• crystals) from Sussex, «"»?• from G1 ‘»' CK>to 
and Monmouth, barite from Mercer and Union. 
The mineral collection is chiefly displayed m twelve sma 
cases in the southwest corner of the Museum. They are arranged 
systematically according to Dana’s classification and numbered 
s'o that ready reference may be had to Danas Mineralogy, a 
copy of whicsii is ill the Museum for consultation. 
Ores .—The Museum is extremely rich in its collection of lron- 
ores. These include specimens from all the iron-ores of tie 
State, which have ever been producers of any importance. 
Since tnanv of these mines are no longer worked, and m some 
eases the 'openings are full of water and are permanently 
abandoned, this collection cannot be duplicated. 
The Museum also has a fine set of copper-ores, chiefly native 
copper from the American Copper Aline, at Somerville. 
The zinc -ores from Franklin arc varied and rich, and the 
Museum lias many fine specimens, zincite, willernite and 
franklinite. 
Rock Specimens .—The rock specimens fill four cases, these 
represent the various types of rock formations found in the State. 
The specimens are of uniform size, carefully labeled with name 
and locality, and are arranged systematically so as to represent 
in proper succession the geological structure of the State. 
Clays .—The clay industry is one of great importance in the 
State. It is fitting, therefore, that the Geological Museum 
should make a good display. All the samples from important 
localities are on exhibition, representing the most valuable grades. 
With the completion of the tests of clay now being made by the 
Geological Survey, it will be possible to increase this exhibit 
greatly, provided cases can be had in which to display the new 
material. 
Sands .—The glass and fire-sands of South Jersey are of great 
commercial importance. A fairly full series of specimens, each 
in a handsome glass jar, is on exhibition. 
Marl .—The green sand marls of the State were formerly of 
great value as fertilizers, and they are still dug to a considerable 
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