1894. | NEW YORK ACADEMY OF SCIENCES. 223 
i II Ill RV; 
SiO, 2.43 2.43 21.39 73.02 
CaO 51.00 0.93 
CaCO, 91.10 70.31 
Al,0,.Fe,0; 0.41 0.41 8.61 18.31 (Al,03) 
MgO 1.00 2.10 1.09 0.87 
Na,O trace - sae 
K,0 0.80 { 6.87 (by diff.) 
Cl 0.31 
H:S0; 0.69 
HZ BOR 0.20 
Organic matter, 1.40 
96.04 99.80 100.00 
The analyst of IV mentions an evolution of H,S as well as 
CO,, while dissolving in HCl. 
The Chazy is worked at three quarries on Willsboro’ Point 
and at Parkhill’s quarry in Essex. Frisbie’s quarry for lime, 
on the west side of Willsboro’ Point, and the adjacent kiln on 
the shore have been in intermittent operation for forty years, 
going into blast about April and suspending work in November, 
with a capacity of five hundred barrels per week. The entire 
product of lime is shipped by canal to New York City. The 
fines, called rubble, are employed in roadways at Plattsburg, 
Burlington and other places along the lake. Many large ortho- 
ceratites and maclureas occur in the ledges, which calcine like 
the rest of the stone. On the east side of the point are the 
quarries owned by 8S. W. Clark and by the Lake Champlain 
Bluestone Co. (Larned, Dickson and McDonald, of New York). 
Together they comprise roughly eighteen acres. The latter 
quarry is opened on the strike, which is N. 80° W., for a length 
of a thousand feet, covering about three acres, with a maximum 
depth of twenty-five feet, all above lake level. The beds dip 
6° to 8° N., and are divided by one set of vertical joints run- 
ning N. 10° E., and another less persistent in an east and west 
direction. The beds vary from one to six feet thick; the total 
thickness of the workable beds being about eighteen feet. The 
quarry was extensively worked from 1854-1869 by 8. W. Clark 
& Co. The stone was employed in the foundations of the capitol 
at Albany and in the piers of the Brooklyn bridge, during which 
time some three hundred men were employed in these quarries. 
