Custer chronicle. [volume] (Custer City, Black Hills, D.T. [S.D.]) 1880-1890, 1885-04-04

treating ore from the tin mines OF the
Black Hillao Of Dakota has Teen in pro-
gress ut the New York MetalIurgical
works Nos. l04 and lO6 Washington
street. during the last three weeks, and
on M 'nday the process was examined
by u number Of men among whom were
Lewis May, John Anderson. Mr.. George,
manager of large works in Pennsylvania
aud New Jersey, Prof g. f. Bailey and
others. Over thirteen thousand pounds
OF ore and two tons Of stream tin have
been brought recently from the mines
and placers, and many sacks and keg-,
containing the metal so precious for
domestic uses in the condition in which
il Was taken from the earth, were placed
In rooms about the large apartment in
which the machinery for separating the
black tin from the granite was in opera.
ton.
Stalwart workmen fed the ore to a
Gates crnsher by which it was broken
mp. Then it was passed between Cor
nish rollers aud further pulverized !;
thence It was conducted into a SCREEN
er" for the, purpose Of separating the
mica from the particles of tin, when the
latter were turned into n vat. whence a
stream OF water carried them into a
Golden Gate c~oncentrator.
The latter is a piece of machinery by
which an inclined plane moved COT.
stantiy back and forth with a jerking
motion, gradually carried the black tin
upward till it flowed over into ore bins
placed beneath, while the worthless
residuum flowed In the opposite direc.
| ton and fell into a receptacle, and upon
examination it was found the tin had
been entirely separated from the refuse
The black tin was then dried, and after
being mixed with charcoal, was ready
for smelling, and after that process was
run Into shining pigs Of pure block Tin.
The ore has been brought to the
m~etallurg.cal works for the purpose Of
testing these processes which were
found to work more economically and
thoroughly than any others that have
been tried, and it was stated that ma
chinery Of this kind would at once be
constructed and sent to the mines,
where the work Of preparing tin for the
market in large quantities will begin in
June.
| The stream tin, which is black tin
liberated from the granite by the pro.
cesses Of nature, working slowly upon a
plan similar to that of the new machin.
cry was explained with interest. In
the placers near the mines the earth in
which the stream tin is found contains
gold in the proportion Of from thirty
cents to SIC per cubic ward Of earth.
I'm II instance" said a man VIII.
had visited the Black Hills, exhibiting
Il vial of gold dust, Il got out thirty fiv.
pounds of tin and this gold, worth Owe
$l9. from fifteen cubic yards Of dirt. The
gold In the placers Of stream tin viii
pay for all the processes of placer work
The ore that is being worked here Wa,
extracted from the mine by men work
ing under my supervision. II IL the re
suit of sampling down hundreds OF. ton,
at the mine. The sacks were sewed an,
sealed and boxed bv me and were open
eel in New York it, my presence, and
have been present at the tests mad,
here. 1t represents only average or,
from the mines. l personally CLEANED
up the stream tin from the Hill City dis
trict from the sluice boxes, and separat
ed the gold which it contained and ship
ped the samples to View York"