No. 50.] 
65 
can be wrought, Essex must become one of the most thriving coun- 
ties in the State.* 
In addition to these deposits of magnetic iron ore, there are also beds 
of the specular ore which are used at Crown Point, &:c. 
Several localities of graphite occur in this county. One of these is 
situated near Ticonderoga and has long been celebrated for the excel- 
lent quality of the mineral which it yields. As early as 1822, two or 
three tons were annually obtained here and sent to market. From a 
statement of property cleared at Whitehall, from 1823 to 1834, it ap- 
pears that there were shipped of black lead in 1829, 10,000 lbs; in 
1834, 22,000 lbs. This amount was probably obtained from the mine 
now noticed. Besides this, there are several other localities of this 
mineral, but I have not been able to learn any thing of their value. 
Among the useful minerals of Essex may be mentioned marble of 
the verd antique variety, a valuable bed of which is found near Cedar 
Point. It appears to be free from cracks and flaws, and is equal in 
beauty to any of the marbles of this kind. 
To the mineralogist, this county presents one of the most interesting 
fields of research. Although it has been but partially explored, many 
rare and beautiful minerals have already been discovered. The follow- 
ing is a list of these : 
Calcareous spar — Several forms and several localities. 
Crystallized phosphate of lime. 
Fibrous phosphate of lime — Eupyrchroiie of Dr. Emmons, (see ap- 
pendix) Crown Point. 
Sulphate of lime — In solution in springs. 
Sulphate of magnesia— In similar situations with the preceding. 
Rose quartz, together with some other varieties of this mineral. 
Tabular spar — Town of Lewis. 
* I have recently analyzed a specimen of magnetic iron ore which I received from 
A. Mclntyre, Esq. It is from the great bed at the head of the mill pond, in the town 
of Newcomb. It is black, attracted by the magnet and has feeble polarity. The fol- 
lowing is its composition in 100 parts — 
Protoxide and peroxide of iron, 92. 15 
Earthy matters, principally silica, 7.85 
Proportion of metallic iron about 66, in 100 of the ore. 
[Assembly, No. 50.] 9 
