No. 16L] 
23 
Major Daliba, and is known in the vicinity by the name of Crag^ 
Harhor. The deposite of ore at this place is about twelve feet 
thick, and dips to the south-west at an angle of about 35° to 40°. 
It is overlaid by a stratum of hornblende, and this mineral is also 
a constant associate of the ore. It is probably to this circum- 
stance that we are to ascribe the fact that it yields a hard and 
brittle iron, which is unfit for many purposes to which that metal 
is applied. But this bed is so advantageously situated on the very 
margin of the lake, and is moreover so extensive, as to warrant 
the trial of a series of experiments for the purpose of determining 
whether this difficulty can be obviated. Probably, by mixing the 
ore with one of a different kind, and by a proper adjustment of the 
flux, this desirable end may be attained. 
The Crag-Harbor ore is of a black color and semi-crystalline 
structure, is tough, and with difficulty broken into fragments. It is 
powerfully attracted by the magnet, and ordinarily possesses fee- 
ble polarity. It is almost always accompanied by hornblende, and 
good specimens of black mica may also be obtained in its immedi- 
ate vicinity. In some specimens I have observed seams of iron 
pyrites. The specific gravity of this ore is 4.729. 
Jl$ialysis of the Magnetic Oxide of Iron from Crag- Harhor^ Essex 
County. 
Protoxide of iron, 24.50 
Peroxide of iron, 66.80 
Silica, alumina, &c., 8.70 
100.00 
Proportion of metallic iron 65.23 in 100 of ore. 
About a mile and a half south-west of Crag-Harbor, is another 
bed of this ore, similar in its geological associations to the depo- 
site just described. It is not, however, overlaid by hornblende, 
nor does it appear to be so highly inclined. The ore is of a grey- 
ish black color, and contains grains of sulphuret of iron dissemina- 
ted through it, which renders the operation of roasting necessary 
previously to its introduction into the furnace. It is granular, 
friable, and is said to furnish a softer iron, although it is less fusi- 
ble. 
The Sanford Ore Bed, situated six or seven miles west of Port- 
Henry, is worthy of particular notice in the description of the iron 
