The Daily state register. [volume] (Carson City, Nev.) 1870-1872, 1871-07-26
WASHINGTON CORRESPONDENCE.
WAsHINGToN, d. c., July IS, 1871.
A VALUABLE WORK ON MINES.

mitted to the Chief of Engineers by
Major King, geologist in charge, has
just been published by order of the
Secretary of War. The author ex-
plains that this volume VOL. 81 has
first been prepared and published be-
cause its subject is most directly APP
piicable tothe national development of
that great extent of mountain country
opened up 10y the Pacific Railroad.
The other four volumes will be de-
voted to, 1st-Systematic Geology: I'd
descriptive Geology; 4th-/OOlogy
and Paleontolo4y; 5th-Botany. The
remaining volumes will be pressed to
completion with all possible rapidity.
The table of contents of this volume
comprises:
Chapter Mining Districts, by c.
King.
Chapter 1.-THE Comstock Lode. by
c. King. Geology OF the Wa>hoe Min
ing District; Structure of the Com
stock Lode in Detail; General Structure
and Mode of Occurrence OF the Com
stock Lode.
Chapter IlI-The COmstock Mines,
by J. d. fIayne. General Method of
Exploitation; Cost and Yield of Ores;
Review OF Operations of Leading
Mines.
Chapter IN-Treatment of the Com
stock Ores, by J. u. IIavne. General
Outline OF the Process; Details OF
Crushing and Amalgamating Ma
chintry: Costs and Results of Milling
Operations: Treatment of the Resi-
dues; Treatment of first class ore.
Chapter N-Chemi>trv ofthe Washoe
Process. Joy Arnold liayne.
Chapter NI-Central and Eastern
Nevada. bvJ. u. iIayne. Mining and
Milling in Western Nevada: Geology
of the Toyabc Range. by :. +. EN-
mons: Mining and Milling a Reese
River: Geology OF the White Pine
District. 10y Arnold lIavne; Mining
and Milling at White Pine: Egan Can
Won District. by J. +. EmmOn>.
Chapter NII-The Green River Coal
Basin. hy Clarence King.
Chapter NIII-CoIorado. by j. d.
Hayne.
chapter IN-Go}d Mining in Colo
RADIO. bv J. u. lIayue. Gilpin County
Gold NcinS-Treatment of tine Ores.
Chapter N-S3lver Mining in Colo
RADIO. ny j. u. iIayne. Georgetown
silver hearing Nein>-Treatment Of
the Ores; Snake River Mines.
The volume il printed and illuStrat-
ed in the highest ~tNlc of art. and ac-
~coinpaniod 10y a large atlas. The ~
geography cmanafei from the Govern
ment Printing Office. and the pl ties
were engraved and printed by julius
Bieu of New York.
In Chapter III, relating to the cost
and Weld of ores IN the Cometoch
mines, the report alludes to the
sUTKo TUNNEL,
Giving at considerable length the de
tails of the project, from which l quote
a. follows:
This great enterprise. Of which the
main features have been briefly given.
was projected ome years ago by
.Ado!ph Sutro. whose name it bears.
and VIC formed a company for the
purpose of CARRYING the plan into exc
cufion. The project WAS at first re
cpivei with great favor, and the lead
ing companies mining on the lode
became subscribers to the stock of the
Tunnel Company. They also en-
tered into an agreement to pay to the
said company $ for every ton of ore
extracted from any part of the mines.
whether from the surface or through
the tunnel. from the time that the
tunnel should reach or pass through
or under the ground claimed by said
miues-besileS other charges for the
TRANSPORTATION OF rock. materials an
men. Concerning the
merits of this scheme, Judged only by
il intrinsic worth a, Il means of cN-
pluifatlun. and not considering the
conflict of interest which might arise
between the owners of the Iunnti and
the owners of the mines. it may he
said that if the lode i to he mined at
such Il depth as the tunnel proposes to
reach. there can be no doubt but that
il affords the most reasonable if not
the only profitable method of doing o
The demand for. or usefulness OF,
the tunnel depends entirely on the
Nili!e OF tne lode IN GepIn; ana the
question. now pending. a~to this value,
i Likely 10 he answered sooner, more
fully. and al less cost. by the several
deep shafts which are now being sunk
from the surface downward, than it
can he hy any other means. These
shafts vary i'll depth from 200 feet to
100 feet. the average depth of tDur or
five oi them being about loo feet.
sinh 7 hose tnrlr ~. ii va IA, f. To ;ha !
tunnel level will require less length of