f)[)i} REPORT ON NATIONAL MUSEUxM, 18S6. 



Serpentine. Dark green; very fine .ind compact; takes a high polish. Deer Creek, 

 Harford County. Deer Creek quarries. Tentii Census, 1881). 2t)8G8. 



Light and dark green, mottled; fine and compact; takes a high polish. G by 



by 3 inches. Broad Creek, Ilart'ord County. Centennial, isro. 17r)14. 



Compact; dark green ; takes a high polish, (i-inch cube. Broad Creek, Har- 

 ford County. Centennial, 1876. 17.^)17. 



Dark green; lino and compact; takes only a dull polisli. Near Biiltimore. 



G. A. Leakin, 188;}. 27(582. 



Biotite gneiss. Coarse; gray. Port Deposit, Cecil County. C^narry of McClena- 

 han & Bro. Tenth Census, 1880. 25:;r)'.». 



Light gray; iine and medium. Two specimens. Near Baltimore City, Balti- 

 more County. J. Harris's (|inirry. Tenth Census, 1880. 2i^^)~6. 



Coarse; dark gray. Opposite Ellicott City, Baltimore County. C.J.Werner's 



(|ua,rry. Tenth Census, 1880. 25358. 



Fine; light and dark gray. Two specimens. Jones Falls road. Mount Royal, 



Baltimore County. J. Cnrley's quarry. Tenth Census, 1880. 2GL»:iO. 

 Biotite granite. Medium ; gray. Ne.ir Woodstock, Baltimore County. W. F. 

 Weller's -puirry. Tenth Census, 1880. 2.5:5G1. 



Medium; gray. Near Woodstock, Baltimore County. Fox Rock (juarry. Tenth 



Census, 1880. 253G0. 



Coarse; gray. Granite, r.altimore County. Quarry of Gill & McMahon. Tenth 



Census, 1880. 25403. 



Fine; gray. Gwynn's Falls, Baltimore County. Old Winan pstate. Tenth 



Census, 1880. 2(;hG7. 



Fine; light gray. Montrose, Montgomery Comity. H. P. Dwyer's quarry. 



Tenth Census, 1880. 26947. 

 Dolomite [marble]. Lower Silurian ; white; crystalline. Texas, Baltimore County. 

 A block from the top stone of the Washington Monuuient. Barney Mooney, 1884. 

 3G050. 

 Lower Silurian ; white; crystalline. Cockeysville, l^altimore County. Beaver 



Dam Marble Company. Tenth Census. 27()()2. 

 Lower Silurian ; white; crystalline. Cockeysville, ]?altimore County. Colonel 



Clark, 1881. 2520G. 

 Lower Silurian ; white; crystalline. Cockeysville, Baltimore County. Tenlli 



Census, 1880. 25015. 

 Lower Silurian; white; crystalline. Cockeysville, Baltimore County. Tenth 



Census, 1880. 25003. 

 Magnesian limestone [marble]. W'hite, with purple stripes; crystalline. New 



Windsor, Carroll County. AVilliam N. Chew's (|uarr.v. Tenth Census. 2Gi)31. 

 Light blue-gray; crystalline. Near New AVindsor, Carroll County. A. A. 



Roop's (juarry. Tenth Census, 1880. 2()807. 

 Gray; laminated. Keedysville, Washington County. John Snear's (piarry. 



Tenth Census, 1880. 26205. 

 White; crystalline. Union Bridge, Frederick County. D. Rinehardt's(|uarry. 



Tenth Censu.s, 1880. 2G829. 



Union Bridge, Frederick County. D. IJinehardt's (juarry. Tenth Census, 1880- 



2G830. 

 Conglomerate breccia [marble]. Triassic; red, variegated. Frederick County- 

 Slab 20 by 30 by 1} inches. Used in the iuteri(H- decorations of the Capitol at 

 Washington, D. C*. Col. Edward Clark, 1881. 28741. 



