LIST OF BUILDING STONES. 67 



97. Encrinal Limestone. A dressed block of a cubic foot, 

 with one face polished. Lockport, N. Y. (Niagara 

 Group.) From B. & J. Carpenter. 



98. Gray Encrinal Limestone. A tine-dressed block of a 

 cubic foot. Lockport, N. Y. (Niagara Group.) From 

 B. & J. Carpenter. 



99. Encrinal Limestone. A dressed block of a cubic foot, 

 with one face polished. Lockport, N. Y. (Niagara 

 Group.) From B. & J. Carpenter. 



100. Gray Encrinal Limestone. A dressed block, 16x13x6 

 inches. Lockport, N. Y. (Niagara Group.) Of the 

 Geological Survey. 



101. Gray Limestone. A dressed block, 12x12x13 inches, 

 with one face polished, and one of rock-fracture. Onon- 

 daga, N. Y. (Upper Helderberg Group.) Purchased 

 for the Museum. 



102. Gray Limestone. A dressed block, 12x12x13 inches, 

 with one face polished, and one of natural fracture. 

 Onondaga, N. Y. (Upper Helderberg Group.) Pur- 

 chased for the Museum. 



103. Gray Ltmestone. A dressed block, 9|xl0i-x8 inches. 

 (Upper Helderberg Group.) Locality and Donor un- 

 known. 



104. Scutella Limestone. A block of a triangular face, 10 

 inch base, 11 inches high, and 6 inches thick, with four 

 faces polished. Hudson, N. Y. (Lower Helderberg 

 Group.) From John Higgins, Troy, N. Y. 



105. Encrinal Limestone. A dressed block, 18x12x3 inches, 



with one face polished. Split Rock Quarries, near Syra- 

 cuse, N. Y. (Onondaga Limestone.) Of the Museum 

 Collections. 



106. Encrinal Limestone. A dressed block, 18x12x3 inches, 



with one face polished. Split Rock Quarries. (Onon- 

 daga Limestone.) Of the Museum Collections. 



107. Chazy Limestone A sawed slab, 30x18x2 inches. 

 Isle La Motte, Lake Champlain. Of the Collections of 

 the Geological Survey. 



