New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1846-09-03

Prof SILLIMAS in the Chair, during the Temporal
| ~ absence OF the President.
A communication was read from Mr.. CozzESs on
the Earthly Matter in Rock Leaf Mould The funds-
mental principle of this mould is probably carried
up by the sap which nourishes the plant by vegea
bic actionThe fine par, OF carths has become fine
by ordinary mechanical means, but by vegetable
action not fully understoodThe removal oil boulders
suggested in this paper OF Mr. c. They caused
by the falling of large trees which fall because they
whist termed topheavy, and leave after the-lying
among their upturned roots-,he boulders.
These frequently observed in fields. On going back
TO the regular subject eight experiments made by Mr.
Cozzens lakewood in the rotten state rock mould.
| &c. were detailed
| The PRESIDENT here appeared. and read an or
sinal essay the Mining Operations IN America The
following among the important portions OF his
marks Why do adventurers in mines rarely succeed
| Not from want OF good workinen from want OF;
capital but because these advenurcrs too much
haste. They speculate in stock without knowing the
value OF their mines They buy and sell their stock
continually, and pay very E,tle attention the metals
within their reach preierring rather 10 barter than
This Is fancy picture but the result, OF nearly all Aer
can mining operations There are IN our country vaua
bic mines and in time they will be properly worked
good mine ephemrral-ii will continue yielding
its treasures generation after generation and ace
age lie who purchases mine obtains workshop :lled
with materials, which /, Is Tor himself 10 turn TO
profitable account good muiiRs engineer should pos.
sess h. these quares /. lie should be good geoo-
sst; He should be perfectly acquainted with ali min.
erals 3 He should be acquainted with and able per.
form chemical analyses Should know the history OF
mining IN other countries than his own and should also
! De fully able 10 direct q number OF men
As 10 the metals and ores OF this country, Gold is
generally nearly pure and here the modes OF washing
both in the United States snd Brazil mentioned
One OF the best OF codmnes known IS IN North Carolina
There. quartz contains the gold and copper pyrites
in abundance In California and Brazil quantities
of gold obtained but the greatest region for this
metal the Eastern slope OF the tral MoGnsinsSrer
IN pure metallic state found IN various combinations,
with copper Specimens OF the copper and silver IL
,ern:Ned were exhibited the members OF the Con-
venuon The appearance OF the silver might not inapty
be kened the fairy part OF beef SO closely eonased
the two metals. Native Ccgpa occurs II gaeous
rocksTi has yet been found II any quantity except
IN New. Hampshire. where il occurs u the compact
mica slae-Leid stands 70 copper Tie su!phuret
Is the valuable. Carbonate Is scarcer-not easily
obtained. In the West. lead appears 10 be pure and
some pieces silver From 70 lbs OF silver have
been found in OF ie8d-Bu; iron Is the tue king OF
metals since is may De termed The cause SAID the
President OF the pernaaency OF ciSihzsaoA N ms
country.
In answer to an inquiry OF Prof SiLLlNAS. the
the President said that al the Copper OF Lake superior
IS nlslsb!e.
Mr.. BRowS stated that Blende, or Zinc ore, from
LehshCo Pa hsd been England, and had brought
there so per ton
Dr. FguTcHwASGgR spoke of Copper found IN
the greensboro rocks CT PcEnsylvsna--. NJ ALGEE
moved ha; the Convention extend invitation 70 al
officers OF the ArIny and Navy This City v-nc;niIy
take the door. sad Join in the proceedings
This was unanimously adopted Prot. DEWEY pzrc-
lsr!Eei experiment re had made ascertain ire
amour, and qualify OF the Sand II Maple Sugar.
The Association ad ouEned until hAipast this morn