The semi-weekly miner. [volume] (Butte, Mont.) 1882-1886, 1884-09-24

per ores, and all Of these should re-
ceive the utmost attention, as they
are the subject of inquiry amongst
mining men and investors. The
Territory also contains extensive
mines of lead, coal and iron, which
should be properly placed before the
world.
In general the exhibits will fall in
to broad classes like the following:
I.-Free milling silver ores.
II.-Base silver ores.
III.-Oxidized copper ores.
-Sulphureted copper ores.
V.-Lead ores.
VI.-Lead ores with gold and sill
yer.
VII.-Free gold ores.
VIII.-Sulphureted gold ores.
KIN connection withtha above,
tiuxes, and coal.
X.-Products of mills and reduc-
ton works.
XI.-Plans and models of mines,
mills and chemical factories.
XII.-Clear and detailed descrip-
lions of the methods adopted for
treating the ore, with plans of ma
chinery.
XIIi.-Each district should send
one suit Of specimens of country
rock, showing the limestone, shale,
quar'zite or granite, and especially
any eruptive rocks that occur i'll the
district.
In regard to the twelfth and thir-
tenth classes of exhibits, we wish t,
say that this exhibition can he made
of greet permanent valae to the min
ing profession if the managers of
mills and other reduction works will
give to the commissioners a short &C.
count of the methods used in reduc-
ing their ores. In mills the weight
of stamps, number OF drops, size of
screens, single "r double discharge,
weight of pan charge, length of pan
run, use of chemicals, both as to
quantity and mode OF adding them,
mode of handling quicksilver,
amalgam and bullion, and the guam
tity of each, proportions of settling
tanks. all questions that affect losses,
in shines or tailings, are
some of the points desired. In smelt-
ing works the STYLE of furnace, char !
acter of ore, fluxes and fuels, the
losses i'll Stag aud fue dust, the man.
agement of sulphuret ores, and
everything that relates to obtaining
= merchantable product in one opera
ton, are in place. It is to be relnem-
bered also that the attention of think
ing men will be aroused most GER
by descriptions of experiments,
novel arrangements and the frank
of difficulties whether
overcome or not.
A careful selection of specimens
showing the county rocks connected
the ores will have great interest
or experienced mining men. Es-
oecially important are the eruptive
:ocks which usually appear in dykes.
The exhibition will be attended by
scientific men who are interested in
'uch collections and who will freely
give their aid in making the ore de-
)Osits of Montana understood and ar
,reciated.
Specimens of ore should he accom-
panied by an assay giving the
mount of gold, silver, copper and
cad. 1t is intended to collect all
'uch facts in the pamphlet. To in
,rease the value of this work it is in.
ended that it shall contain a short
from each district, giving
he position. altitude. surface char,
'cter, whether mountainous or roll
ng,) population and other facts of
he district at large, and also the es-
'ecial facts connected with each
nine represented in the district.
Products Of the farm and the gar
len, grasses, wild ard cultivated.
,rass seed, wheat and all varieties of
in sheaf and in seed. Speci-
of grass or grain in sheaf should
how the whole plant, including the
DOT. This is, however, a matter that
must be lett largely to the best die .
of the exhibitors. It is import !
mt that a number of specimens of t
ach variety be sent, and seeds of all :
.inds should be furnished in uuanti- 8
les sufficient for illustration. They l
hOuld be put up in muslin Tor strong {
aper) bags.
Collective exhibits may comprise
of other natural resources, ,
lcn as: :
Actual or prepared specimens of d
nimals, birds, fishes, insects, etc. t
Geological specimens, fossils, petri- q
.ctions, shells, etc. .
Prehistoric relics, antiquities and =
lriOsities. I
Specimens of soils from the vari~ 2
geological formation of the sec e
on represented, with analyses. r
Specimens of waters and mineral '
aters of the section represented,
it'll analyses. r
Specimens of native woods in con- y
form. n