The Saint Paul globe. (St. Paul, Minn.) 1896-1905, 1900-09-09

pam ana similar apparatus which separ-
ATE the s1lVer-bearing galena, pyrites. and
other minerals contained in the ore The
'tailings," or refuse rock 10 d,1n-,aa rs ,-te
a tank pSN iiAeO
If the ore is a base ORE that is to saw
containing valuable constituents in chem.
lcaI combinations, 1t goes through a diff
1erent course Of treatment Base ore fs
also found In the other kind, and this
pase ore is saved in the foregoing nroce.a
on the concentrating tables. The base ora
Is elevated from the sampHng rnachinS
TO a series OF four revolving screens
What is refused" Or does not 90
through the first screen, is returned To
the nne rolls and reground, and is then
screened. From the screens the ore is
washed in Gigs" where the valuable
constituents are taken out ready for
smelling, the refuse going to a mill, look
ing like huge coffee mill, which stands
ABOUT where the batters once stood. and
having been properly milled an elevator
delivers it to a hydrulic sizer, going
thence to the concentrating tables fol-
lowing the same course as the free gold
ores.
SMELLING WORKS.
The valuable constituents extracted IN
the "jigs" go to the complete smelling
works in the new wing, where they are
roasted to oxidize the sulphites, and
smelted by suitable processes, giving fin
ished products in gold. silver, lead and
copper, according to the ores.
The power for this plant is furnished
by three fifteen horse power electric mo-
tors driving two line shafts, and the wa
ter used will be pumped over and over
again to avoid waste
In the gold and silver mill and the
smelt1ng works practical experience in
operating machinery, furnaces, etc, will
be afforded, as well as opportunities for
practical assaying
The S.mpkins laboratory will be devoted.
IN accordance with the traditions of the
university, to research work, and practi-
cal tests Of ores, as we'll as to the train
Ing of the students in the use of the ma
ch1nery, preparing them for the real work
OF mining engineer, suppIementing the
lecture courses of the mining department
Prof. Smith will lecture on mining, pros
peeting and kindred subjects while this
new work will be under the direct charge
or George S. Raymer, instructor in min
ing, who graduated from Harvard college
in 1878, and from the Columbia School of
Mines in 1881, as engineer Of mines. ana
who has had long and valuable ex-
per1ence in the Western mining fields
In addition to this practical milling work,
Mr.. Raymer will give courses in assay
Ing. Competent assistants will aid in the
work.
THEORETICAL INSTRUCTION.
The idea of the mining courses of the
department Of mining and metaIlurgy Is
to give the best theoretical instruction,
side by side with practical experience,
for the students will furnish all labor in
the Simpkins laboratory; SO that when
employed in mines they will know just
how the work should be done and be
able to meet the difficulties which arise.
The courses include prospecting and
exploring, with sampling and the prin-
ciples of exploitat ton; the metallurgy of
iron and steel; the metallurgy of copper,
nickel, lead, zinc, and the minor metals;
ore dressing, concentration, and milling,
with the wet methods of ore treatment;
metal and coal mining and their exploit
alton; metallurgical chemistry, including
the analysis Of ores and metals; and the
more advanced course of the ANALYSIS Of
metals, fuels, s3ags and refractory ma
terials. instruction in the courses is given
by means of lectures, work in the two
practical laboratories, and by reading
and excursions.
1t is the intention of Harvard UNIVERSE
ty to send out in the future as well
trained mining engineers as can be pro-
duced; and in pursuance of this plan
rigid examinations will be held and
high standard required of students grad
uated from this course
1t is only of late years that Harvard
university has re-entered the field of en-
cheering, but the growth has been phe-
nomenal, and the now mining department
is only one of a number of features of the
work which is being developed.