M.\\ l'ORK - i a i i MU8EUM 



9 Ine valley 



l" Bufl Lraulic » Buffalo, X. Y. 



11 l tica, 111. 

 Milwmuki 



brand, Louisville, Ky. 

 it •• Hulme/ 1 Louii 



l:. \. !.. a C. n... Roeendale, X. Y. 

 l.. •• Rock lock 



•N.Y.a I:.' 1 

 18 "Hoffman" u 



falls " 

 mberland, Md. 

 21 Napanee, < tat. 



ewman," Akron, X. Y. 

 •• ( iimmings" 



- itb Riverside, Cat 



- Brockett," Fori Scott hydraulic, Kansas City, Mo. 

 Dtica brand, Utiea, ill. 



Shepherdstown, W. Va, 

 28 Howard hydraulic cement, Cement, Ga. 

 _"' Hydraulic cement rock on Platte river, Xeb. 



Mankato, Minn. 



31 Cement rock, near Salt Lake City, U. 



32 St Louis hydraulic cement, near E. Carondelet, 111. 



33 Barnesrille, 0. 

 3-t Warnock, 0. 



Austin, Minn. 

 .;•'. Blacksburg, S. C v cement rock. 



Round Top cement, Hancock, Md. 

 38 Balcony Falls, Va. 



adale region of New York is one of the best pro- 



ducera of natural cement (of the dolomitic type) in this country, 



hut hydraulic limestone is found more or less in many states, spe- 



Uy tliu.^e of tlie Appalachian region of the east. Others occur 



in the west and in the region of the Great lakes. Some idea may 



h.- gained of tlie extent of this industry at the present day by 



i that the \v<.rk< fur making natural hydraulic cements are 



found in New York, Pennsylvania, Maryland, Virginia, West 



Virginia, Ohio, Illinois, Kentucky, Minnesota, Kansas, Utah, 



New Mexico, Wisconsin and Texas. According to the United 



ological survey, there were 7G plants in operation in 



l B99, which produced 9,868,179 barrels of natural cement, worth 



