SPECIMENS IN THE ECONOMIC COLLECTION 63 



CLINTON GEOUP. 



1. Brown Saudstone: A block eight inches square and five inches thick; 



dressed faces, witli rosette cut on one side. Frankfort, Herkimer 

 county. 



2. A block of the same stone, thirteen by seven inches, and four inches 



thick; dressed faces. Frankfort, Herkimer county. 



NIAGAEA GKOUP. 



1. A block of one cubic foot: one face showing rock fracture, one polished 



face showing the regular crinoidal columns, the other faces dressed 

 in several ways. From Lockport. 



2. A block of one cubic foot: one fiice showing rock fracture; one face 



polished, a fine gray marble; the other faces variously dressed. 

 Lockport. 



3. One block of a cubic foot; one face showing rock fracture; the other faces 



variously dressed to show adaptation of the material. A fine gray 

 block. Lockport. 



4. A block twelve by sixteen, and six inches thick; all the sides dressed. 



A gray stone. Lockport, N. Y. 



LOWEB HELDEKBEKG GROUP. 



1. A block of Encrinal Limestone, of triangular form, with faces polished, 



showing variegations from crinoidea and other fossils. Near Hudson. 



2. A block of polished Black Marble from the Tentaculite Limestone, two 



feet four inches long, thirteen inches wide, and seven inches thick, 

 resting on a large block of the same stone, one face showing rock 

 fracture and the other faces dressed as a building stone; showing the 

 adaptation of the rock to building and ornamental uses. From Scho- 

 harie. 



UPPER HELDEKBEEG OR ONONDAGA LIMESTONE. 



1. A block of one cubic foot; light gray color: one face rock fracture, one 



face polished, the others variously dressed. From near Syracuse. 



2. A block of a cubic foot; bluish gray color: one face showing rock frac- 



ture, the others variously dressed. Near Syracuse. 



3. A block ten by seven and nine inches; gray stone, with dressed and 



fractured faces. 



4. One block ten by seven and nine inches; gray stone, dressed faces. 



5. One block of a foot by eight and ten inches; dressed faces, with one 



showing rock fracture. (The particular quarries of 3, 4 and 5 are 

 not known.) 



6. A slab twelve by eighteen inches; light gray stone, polished face, show- 



ing organic remains. 



7. A slab twelve by eighteen inches; color gray or bluish gray, and with 



one face polished. 



