Observations on Lead Ores. 173 
I have now, I believe, repeated to you the principal facts 
‘mentioned this morning. If they afford you any amuse- 
ment I shall be ighly. gratified. 
Sir 
Your obliged and obedient friend and ss 
THOMA S JARMAN. 
Arr. XXIV. —Notice of an argentiferous galena, from 
Huntington, and of another Lead Ore from Bethlem, Conn. 
with miscellaneous observations on Lead Ores—the lat- 
ter extracted, chiefly from authors. + Enrror. 
nak veelition of galena, sabes the territory of the ‘ni- 
‘ed Se are very numerou ee 
We have published but a gp small part, of ieee that 
have come to our knowledge, chiefly because the quantities 
discovered, have been in most instances, too small to make 
it an object to prosecute the research; and still, when we 
remember that the first hint of the existence of a valuable 
mine may arise from the occurrence of a minute quantity of 
ore, it is obvious that all such facts ought to be preperngs 
either in public or private documents. 
In Dr. Bruce’s Journal, (pa. 65,) some account is given 
of. the valuable and interesting lead mines near Northamp- 
6 in Massachusetts, and, in the present number of this 
ork, an abstract is given of some of the principal facts. 
pera by Mr. Schoolcraft, an the rich mines of Mis- 
souri. These mines, fron their richness, and from the 
facility se? which ies ore is obtained, it is probable, will 
supply the demands of this country, for ages, and if they 
cannot et a exclude the introduction of foreign 1 3 
there appears” little probability that. many other. American 
Jead mines can enter successfully into competition wth 
them. - 
“We make this remark, not to discourag -onterprine im 
other places, -but to. ‘produce caution, in plunging into the 
expen hich inevitably attend min es [ 
tions—while the ropes are always in a degree uncertain. 
But, with respect to the ocalities of lead, there is 
another consideration which maybe worthy of attention ; ‘it 
