BUILDING AND ORNAMENTAL STONES. 531 



Biotite gneiss. Coarse; gray. Stafford Springs, Tolland County. Truesdell quarry. 

 Tenth Census, 1880. 26277. 



Fine; gray. East Glastonbury, Hartford County. C. Hentz's quarry. Tenth 



Census, 1880. 26415. 



Hornblende biotite gneiss. Fine; dark gray. Middletown, Middlesex County. 

 Centennial, 1876. 17541. 



Fine ; dark gray. Haddaui, Middlesex^ County. I. Arnold's quarry. Tenth 



Census, 1880. 26327. 



Medium; dark gray. Greenwich, Fairfield County. T. Ritch's quarry. Tenth 



Census, 1880. 26338. 



Medium; dark gray. Greenwich, Fairfield County. William Rich's quarry. 



Tenth Census, 1880. 26339. 



Coarse; dark gray. North Bridgeport, Fairfield County. W. Beer's quarry. 



Tenth Census, 1880. 26649. 



Granite. Turned column of coarse pink porphyritic granite. 16 inches high and 6 

 inches in diameter. Leete's Island, New Haven County. Centennial, 1876. 17566. 

 Diabase. Mesozoic; fine and compact; dark gray; nearly black on a polished sur- 

 face. Used chieily for street pavements. West Rock, New Haven County. C. 

 W. Blakeslee's quarry. Tenth Census, 1880. 25912. 

 Sandstone. Triassic; brown; medium. 12-inch cube. Portland, Middlesex County. 

 Shaler & Hall Quarry Company. Centennial, 1876. 17534. 



Triassic; coarse; brown. Portland, Middlesex County. 17536. 



Triassic ; medium ; brown. Portland, Middlesex County. Middlesex quarry. 



Centennial, 1876. 17557. 

 Triassic ; medium ; brown. Portland, Middlesex County. Middlesex Quarry 



Company. Tenth Census. 25424. 

 Triassic ; fine ; brown. Portland, Middlesex County. Quarry of Shaler & 



Hall. Tenth Census. 25483. 

 Triassic; fine; brown. Portland, Middlesex County. Quarry of Braiuard & 



Co. Tenth Census. 26077. 

 Tr.iassic ; medium; red. Manchester, Hartford County. C. O. Wolcott's 



quarry. Tenth Census. 26129. 

 Triassic; fine; red. Manchester, Hartford County. C. O. Wolcott's quarry. 



Tenth Census. 26429. 

 Triassic ; coarse ; reddish gray. East Haven, New Haven County. Robert 



Redfield. Tenth Census. 26453. 



DAKOTA. 



Quartzite. Potsdam; reddish brown ; fine and compact ; used for geueral building, 

 tiling, and ornamental work. Sioux Falls, Minnehaha County. Tenth Census. 

 26662. 



Potsdam; light red ; fine and compact ; used for geueral building, tiling, and 



ornamental work. Sioux Falls, Minnehaha County. J. L. Phelps's quarry. 

 Tenth Census. 26663. 



DELAWARE. 



Augite hornblende gneiss. Fine; dark gray. Near Wilmington, New Castle 



County. P. P: Tyre's quarry. Tenth Census, 1880. 25401. 

 Dolomite [marble]. Lower Silurian; white; crystalline. Hockessin, New Castle 



County. Jackson Lime and Marble Company. Tenth Census, 1880. 25402. 



