Miscellaneous J^otices in Mineralogy, Geology, ^-c. 231 



&ic. For cisterns it will be much used, no doubt, and for 

 all the principal erections of stone work for canals, it is in- 

 dispensable. 



Respectfully, I am, 



Dear Sir, your Obedient Servant, 



BENJAMIN WRIGHT. 

 W. W. WooLSEY, Esq. 



We are informed by Mr. Woolsey that the price of this 

 lime, pulverized and burnt and delivered at Utica, is twenty 

 cents the bushel. Mr. W. remarks, that " Mr. Wright is a 

 gentleman equally distinguished for respectability of char- 

 acter, and high attainments as a civil engineer," and tha^ 

 " his accuracy may be relied on." 



Postscript, April, 3, 1821. 



In February we had an interview with Mr. White, from 

 whom we obtained the following result of the analysis of 

 the hydraulic lime, by Dr. Hadley. 



Carbonic acid, - - 35,0^ 



Lime, _ _ - _ 25, 

 Silex, - - - - 15,05 



Alumine, - - - - 16,05 

 Water, - - - - 5,03 



Oxid of iron, . - - 2,02 



98,20 



To this notice we add the following extract of a letter from 

 Myron HoUey, Esq. one of the Commissioners of the great 

 canal, dated Albany, 2Qth January, 1821. 



Mr. White, one of our Engineers on the Erie canal, and 

 a man of good character and useful attainments, especially 

 on subjects connected with his profession, discovered, in 

 the course of the season before last, the material for making 

 an excellent water-proof-cement, existing in great abun- 

 dance in the western district of this state. And we have 

 made extensive and profitable use of his discovery in the 

 locks and other mason-work of the Erie canal. It is proba- 

 bly superior to Parker's Roman-cement, in quality, and may 



