HYDRAULIC LIMESTONE. 
81 
The cement manufactured at this place was used in the construction of the aqueduct at 
Syracuse, and in that of several of the locks on the enlarged canal. 
The water limestone from this quarry has the following composition : 
Carbonic acid, ...._........_...... 39.80 
Lime,.. 25.24 
Magnesia,.........._... 18.80 
Silica and alumina, ....... 13.50 
Peroxide of iron,. 1.25 
Moisture and loss,. 1.41 
According to Mr. Hall, the formations from which water limestone has been selected, ex¬ 
tend across Monroe County from east to west; the one through the towns of Penfield, 
Brighton, Gates, Ogden and Sweden; the other through Mendon, Rush and Wheatland. At 
one locality in Ogden, this li-rnestone has been burned and used for cement in the locks of the 
Erie canal, and is said to have been of good quality. The same kind of stone may be found 
at the upper falls of the Genesee at Rochester.* 
In Orleans County, some of the upper layers of the rock at the falls of Oak-orchard 
creek are used for the manufacture of water cement. A stratum of hydraulic limestone also 
occurs at Lockpor't in Niagara County, which has been used in the public works at that 
place ; but some doubts have been entertained in regard to the goodness of the material. 
Erie County. ' Water limestone has been found on Grand Island, and at Williamsville in 
this county. The specimens which I received have a dark drab colour, and the usual con- 
choidal fracture. The following are the results of their analysis—No. I. from Grand Island; 
No. II. from Williamsville : 
Carbonic acid, ... 
Lime,.... 
Magnesia, .... 
Silica and alumina, ... 
Bituminous matter, moisture, &c. 
I. 
II. 
41.01 
37.66 
28.79 
26.11 
17.70 
16.48 
12.25 
18.45 
0-25 
1.30 
Finally, water limestone occurs near Depeauville in Jefferson County; and also near 
Waddington in St. Lawrence County, where it forms an. extensive stratum. It is said that 
the value of the water lime annually manufactured in the latter county is $40,000.t 
Such are some of the more important localities of this valuable mineral product. The 
number of these.will no doubt hereafter be much increased ; and perhaps many quarries, now 
little valued, will be found upon examination and trial to furnish cements equal to those at 
present so generally employed. 
* New-York Geological Reports, 1838. 
Part I. 11 
t Report of the St. Lawrence Railroad Committee. December, 1838. 
