New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1879-10-10
PROFESSOR STEWARDS LECTURES.


MINERAL nTPOsTIs AND THE WORK or MINING.
The second lecture of Professor Stewart. of
Virginia City, Nevada. which was given Wednesday
evening. az Association Hall, was devoted to the
geological formation Of the earth and to theories Of the
deposit Of minerals. The practical work OF mining ana
the value % mines and mining stocks were considered
last night in the Last lecture OF tho course The lecture
last night was illustrated 10y charts showing
the geological formation OF the Pacific slope
Tho discovery OF the fossil remains OF elephants in
high Northern ATTITUDES said the speaker and the ndi
Of glaciers I'm tropical countries. proof that
the earth las been subject at some period OF its his
tory complete ovcrturnS which 10 be attributed
10 the magnetic influence cNeried upon the earth
nv the sun. The American Continent was ut
one time series OF blazing volcanoes; the
interior mighty sea. Tide marks 9oo
feet above the present level OF the Great salt
Lake planiS visible now. The sea heated hy these
volcanoes held in chemical solution large quantities. OF
mineral matter Then came the eruption through the
thin crust OF the mountains Of the Sierra Nevada range
In some couvu sion they pushed. huge masses OF
sold granite, tArough the surface. on the California
slope crust composed largely OF siae ana the
strata have dip toward the west on The nevada sl"c
oy pitch toward the east. aud composed OF meta
morphic rocks. The open crevices were hhed In time
with the mineral matter held in solution 10y the sur
rounding waters ON the California side the veins have
been found very rich N gold at the surface nut they
became poureras they descendedunt they disappeared
in barren quartz ON the other side the gold Is asso
clicd Invariably with silver. On tie Comstock Lode
gold Is found at the surface but the mines NJ greater
depths became SILVER mines instead of gold mines. The
exceptions the Bonauza Mines. which nj depth OF
200 feet are yet profitable in yielding gold.
Inc speaker expressed the opinion that true hssure
veins never could be exhausted. He then explained
the effects Z capitalization. the laws Of which, he said.
every thing follows. IL held by some authors that
The earth itself vas one immense crystal Everything
in a rf.ND
OF tie earth crysialz I'd, tne atoms obeyed the law OF
polarity. Tho mountain chains followed therefore, the
rtfsich formation oi thr c"h'lh'ui. Inc rocks h4u
t.er aN oi ceNt-c fractures, tlcnchLg trhtIhlN IN
northwest and southeast direction. TINS WAS due To
electrical act!yiy ard attraction. In tie process of
COO me-, ciN- i<tuol brshh IN IN" chasus WHl'h htu
I'ceu rtui iu the carh', surface. All misIa deposits
were I'D Se by tne cry oi maeIa matter Ag,a
speaker attributed Ia the electric currents which encr-
cod tie earth. Occasional disturbances OF these cur
rae lad occurred but ihr! 0ny proved tHe CORES IncSs
This Iicor, ant of that OF chemical solution. Erc-
that subtle. unAnoMn lnNisiWe agency, McumpIthcisl-
VERSE; under thc hat of The Almighty"
inr coucnling lecture oi lhc srits was hs'.heu 70
'a-t evening hl an auilencc somewhat larger than
unurd nls remarks on the geological iormatonot tue
Pach slope, 'sl" cnly iu respect 10 assure veins In
~. ,,,.rfS IN rad ~ mem ms hen as,ertaiued bv
h.uDs- o0pcit-. Mining rightly und. rsiood ana cone
oi tt,r. MONEY equal In imuori1nco 10 agriculture;
Eve ell ana iaa - tie port Il stock gamblers II be
cuul.s tnc most naz irdous aud dangerous Bay
IN mining stocks 81 ,,ew-Nofk with the mines
iu California - lkc playing faro with the oasekecper
distant CIV. For twenty years Tie COmsock mines
hsv. iufrlo nattra tor me stock pambllIs of san
Francisco. Fortunes have been made and lost III the
sDcks which lave not yicd an ounc o. ore IN
many year,. Mines should be worked for DE ore in
them IN their stocks. IL cuuclu
siol thanked his listeners FOR the privilege
of addressing NtN-NOrk audience. The whole CONT
r.nt sfld vast bed Of minerals. Foreigners
are awakening To the Importance Of the country a.
of NeW-Aulk alone seems blind 10 these
vast interests ut be cHru-ncWarc of the wilos Of
these trlchstcrs deal IN stocks. Ibc time Viii
surely come when Americans will work tAerowu mines,
independent OF foreign dlctatOn.'