422 REPORT ON NATIONAL MUSEUM, 1886. 



It has been quite generally used, and is one of the best-known granites 

 in tlie State. 



Missouri. — Although there are inexhaustible quantities of granite in 

 the northern part of Iron and Madison Counties and the southern por- 

 tion of Saint Francois, there are but few quarries of the material sys- 

 tematically worked. 



At Graniteville, Iron County, and in Syenite, Saint Francois County, 

 there occurs a coarse red granite, quite poor in mica, which is now ex- 

 tensively quarried for the Saint Louis and Chicago markets. It is 

 somewhat lighter in color than the well known Scotch granite, but 

 is admirably suited for massive structural purposes, as is well illus- 

 trated in the lower stories of the fine business blocks erected during 

 the season of 1880 on Adams street, between Fifth avenue and Frank- 

 lin, and on the corner of Adams and La Salle streets, in Chicago. The 

 enormous blocks of rock-faced granite and large polished columns of 

 this stone as here displayed* would indicate that this is destined to be 

 one of the leading granites of this portion of the country. It admits 

 of a high lustrous polish and is coining into use for monumental work. 



Montana. — There is a plenty of good granite within the limits of the 

 Territory, but for lack of a market scarcely any quarrying is at present 

 carried on. 



A cube of a fine-grained light-gray biotite granite was received at 

 the National Museum from Lewis and Clark Counties, but so far as the 

 writer is aware the quarry has never been worked to any extent. A 

 coarse hornblende-mica granite of a greenish-gray color and somewhat 

 resembling the celebrated Quincy and Gloucester (Massachusetts) stone 

 forms the country rock in the region of the celebrated silver and cop- 

 per mines of Butte, and is beginning to be used for purposes of heavy 

 foundation and general building. So far as the writer was able to 

 judge, from the short time he was on the ground, the rock is of excel- 

 lent quality, but needs to be selected with care, as certain portions, 

 those in proximity to the ore veins, are abundantly charged with 

 pyrite, which oxidizes readily on exposure. 



New Hampshire. — Although New Hampshire is popularly known as 

 the "Granite State," in value of total product of the material it i.anks 

 but fifth in the list of New England States, being preceded by Maine, 

 Massachusetts, Connecticut, and Ehode Island. However this may be 

 there are but few of our building stone that have a wider reputation than 

 the fine light-gray muscovite-biotite granites from quarries near Concord. 



" The window-sills in the first of the above-mentioned buildings are rough blocks 

 of granite, each 3 feet square by 17 feet 4 inches long, and weighing about 10 tons 

 each. The polished columns of the building corner of Adams and La Salle streets 

 are ten in number, each 18 feet high by 4| feet in diameter, and weighing not far 

 from 18 tons. The largest single block of polished granite yet produced at these 

 works is the Allen monument, in Saint Louis, which is 42 feet in height by 4-£ feet 

 square at the base. The weight is about 45 tons, 



