THE COLLECTION OF MINERALS 
Second, that the minerals of the earth's surface necessarily 
are the sole source of all the elements useful in the industries and 
the arts; 
Third, that minerals appeal to our sense of beauty, and are as 
much to be regarded as objects of artistic appreciation as are 
the beautiful colors and forms of the animal creation. 
BARITE FROM CUMBERLAND, ENGLAND 
THE MINERALS OF MANHATTAN ISLAND. 
MANuatTTAN Island is an area of crystalline rocks, consisting 
of gneisses, mica-schists, granite, hornblende rock and magnesian 
limestone (best exposure along the Harlem Ship Canal, Kings- 
bridge), with a very limited zone of serpentine (roth Avenue and 
58th Street). The island has been covered by Drift deposits, 
sand, gravel, clay and scattered boulders, concealing much of the 
rock surface.. From the original bed rock, especially the numerous 
granite veins and dikes, and from the mineral masses trans- 
ported from the north and distributed over its surface, collectors 
21 
