260 
GEOLOGY OF THE SECOND DISTRICT. 
To compare this iron with others, it is proper to assume bar No. III. as the standard, that 
having been hammered till of a dull read heat. The report already cited furnishes us with 
abundant data derived from experiments, made with the same machine, on other kinds of bar 
iron, in a similar state. Thus we have. 
Iron from Salisbury, Connecticut, by a mean of .. 
— Sweden, do 
— Centre county, Pennsylvania, do 
— Lancaster county, Pennsylvania, do 
— McIntyre, Essex county, N. Y. (as above,) . 
— England, cable bolt, (E. V.). 
— Russia,.. ..-.. 
Strength in Iba. 
40 
trials, 
per sq. inch. 
58-009 
4 
58-184 
15 
a 
58-400 
2 
58-661 
4 
ii 
58-912 
5 
59-105 
5 
(6 
76-069 
Hence it appears that the last only is essentially superior to the iron of Mclnt 3 n:e. These are 
among the best varieties of bar iron in point of tenacity. 
The fracture is of a light iron-grey color, silky lustre, and generally displays a compact 
structure. It is worthy of remark, that most of the fractures took place in directions oblique 
to the line of tension, and making with it, either in the breadth or thickness, one or more angles 
of about sixty degrees each. 
The fibrous structure of the metal was very marked in cutting with the cold chisel, and 
was further developed by acids on a part of No. Ill, on the surface of which delicate lines 
were shown traversing a distance of several inches. The specific gravity in the annealed state 
was, it appears, increased 1 • 2 per cent by hammer-hardening. 
In conclusion, it may be observed, that as a large and increasing demand for good iron 
prevails in the United States, in proportion to the increase of finished and accurate machinery 
requiring superior materials as well as workmanship, there can be no doubt that any quantity 
which could probably be produced, if possessing the properties of that above described, would 
command a ready market and the best of prices. 
Advantages of Adirondack as a location for the manufacture of Iron. 
All the circumstances which are favorable to the successful prosecution of the iron business 
are centered at Adirondack, except one; and this will be understood at once as referring to 
its distance from market, without convenient means for transportation. At an earlier day, 
this would be an obstacle almost insuperable ; but at the present time, when enterprises of 
importance will be prosecuted notwithstanding distance and the interposition of mountain bar¬ 
riers, this single obstacle can not prevent the successful prosecution of this important manu¬ 
facture. 
At Adirondack, I trust it has been clearly shown there is no limit to the amount and quantity 
of raw material; and that this is of such a quality, as few if any locations in this country can 
boast of affording. There is, too, a great supply of wood. The valley and mountain sides are 
