[ 23 ] 40 



List of specimens referred to in the foregoing report. 



18. Red Potomac sandstone, Bull run, near Seneca creek, Montgomery 

 county, Maryland. 



19. Grayish-purple or pink variety of sandstone, Bull run, near Seneca 

 creek, Montgomery county, Maryland. 



20. Disintegrating argillaceous beds, College quarry, west of Bull run, 

 Montgomery county, Maryland. 



21. Dove-colored bed, College quarry, west of Bull run, Montgomery 

 county, Maryland. 



2)fl!. Banded variety of 21. 



22. Purple and brown beds. No. 21, College quarry, west of Bull run, 

 Montgomery county, Maryland. 



And, on motion, the committee adjourned. 



EIGHTH MEETING— March 16, 184T. 



Present, Messrs. Seaton, Hough, and Owen. 



The chairman laid before the committee the following letter : 



Washington, March 15, 1847. 



The subscriber will furnish all the stone necessary for the cutting for 

 the Smithsonian Institution upon the dock at Washington, for the follow- 

 ing prices : 



For East Chester marble, such as the Post Office Department is built 

 of, for the sum of seventy-five cents per cubic foot. 



Mount Pleasant or Sing Sing marble, from the Mount Pleasant prison, 

 for the sum of fifty-five cents per cubic foot. 



JAMES HALL, 

 Westchester County, New York. 

 Hon. Robert Dale Owen. 

 Wm. J. Hough. 

 W. W. Seaton. 



P. S. — I will name Horace Butler and James Poster, both of the city 

 of New York, as security for the faithful performance of the above. 



JAMES HALL. 



The chairman laid before the committee the following letter : 



Baltimore, March 15, 1847. 



AVe, the undersigned, do hereby agree to deliver to the committee of said 

 institution white crystallized marble for rubble work, on the cars at the 

 quarry, in pieces weighing from 75 to 3,000 lbs. each, at ^2 20 for 3,000 

 lbs. ; it being considered equal to one perch of stone. 



If the range work should be adopted, we will agree to deliver the stone, 

 as per specification of 8 in bed, at the building in Washington, at 50 

 cents per superficial foot. 



We will also agree to furnish the dimension-stone, delivered at the 

 building in Washington, at 53 cents per cubic foot for stone not exceed- 

 ing 1,0U0 lbs. in weighty from 1,000 to 2,000 lbs., 57 cents ; from 2,000 



