381 



with fossils. Portions give out a very strongly bituminous odor. The 

 stratum exposed is very continuous and has been removed with wedges in 

 pieces ten feet in length ; but the blocks are apt to sever under the chis- 

 el. From this locality are said to have been furnished the caps and 

 sills for the court house at Monroe. It will compare in appearance with 

 the much admired Ohio stone. This locality is said to afford the best 

 lime in the county. 



Rock of a similar character forms the bed of the Raisin at Dundee. 



LIMS. 



More or less has been manufactured at most of the localities of lime- 

 rock above mentioned. 



Three kilns are maintained by the quarries at Plumb Creek. Prob- 

 ably 900 or 1000 bushels are made annually. 



At the quarry on section 19, VVhiteford, five kilns have been burned, 

 of 500 bushels each. 



At the Macon quarry eight kilns have been burned, of 800 or one 

 thousand bushels each, which sells at Tecumseh for four shillings per 

 bushel. 



SAND. 



The only locality particularly worthy of mention, is that of the dis- 

 integrated silicious rock, found, as before noticed in Raisinville, on the 

 farm of Mr. Thos. Col well. This bed was noticed by the State Geolo- 

 gist, in his report of last year. It is mostly pure silex, and for the man- 

 ufacture of glass, superior to any yet found in this State. A specimen 

 of glass manufactured from it, in the possession of the proprietor, was 

 unusually transparent and free from flaws. 



Much of the sand of the plains in this vicinity, and even as far 

 down as Monroe, is intermingled with white silicious grains from this 

 rock. 



CLAY. 



The clays are in general too calcareous to be used with advantage 

 for bricks or pottery. The upper brown, or yellow clay, is least so, and 

 may be found conveniently for brick at numerous places throughout the 

 country. 



The manufacture has been conducted extensively at Frenchtown, op- 



