METALS AND THEIR ORES. 67 
native copper, wolfram, fluor, and molybdenite. In 1843, eleven and a half ounces of 
ingot tin were obtained from the Jackson ore; but the mine never seems to have been 
worked steadily, though it was being mined at the time of my visit in 1864. 
The following notes in regard to the working of the tin mine were furnished by 
Mr. George N. Merrill, as also a view of the tin locality, and a profile (Fig. 8) show- 
ing the situation of the schist and shafts. 
«<The American Tin Company was chartered by the legislature of New Hampshire 
July 15, 1864, and they issued sixty thou- 
sand shares at $5 per share. The company 
vactually expended and paid out $4,371.69. 
The last work done at the mine was in 
August, 1865. The company sunk two 
shafts, one twenty-five the other forty-five 
feet, and made an adit ninety feet. To 
have reached the main shaft would have 
required an adit 400 feet in length.” The 
rock excavated from the adit is composed 
“yaoy 06 “IP 
mainly of a uralitic sienite not found else- 
where. This may furnish a clue to the kind 
of rocks carrying tin. 
Considerable time has been devoted to 
exploring the country between Madison and 
Milan, where it was supposed, from the 
character of the rocks, that tin might be 
found. In many places there are indica- 
tions of metallic deposits, but for the most 
part they are iron sulphides, at least on the 
surface, while a few blasts might reveal 
something more valuable. Every new mine 
that is discovered has characteristics pe- 
culiar to itself, and these have to be care- 
fully studied before any one can form a 
“Jaoj cob “YeYs UleUI 0} JIPe Jo souULIQUA WOIy DOULISICL 
‘NOSHOV{ ‘ANIJ[ NIT, LY SONIMYOM AO NOILOAS—'g ‘SIT 
correct judgment in regard to it. Minerals 
present themselves, too, under so many 
different phases, and when exposed to the 
atmosphere are often so changed as scarce- 
ly to be recognized, that no one, unless he 
has made explorations, can form any esti- 
mate as to the time required or the labor 
necessary to be performed. Hence, explorations for tin in New Hampshire require 
the expenditure of considerable means in costeaning and sinking shafts before it will 
be possible to pronounce definitely that the metal cannot be found. In going from 
