Freeland tribune. (Freeland, Pa.) 1888-1921, 1900-12-31
SCIENCE AND INDUSTRY.

6ClENC ANU INDOo MI
Experiments carried on at the Uni
versity of Illinois show that coal
washing removes a considerable per-
centage of the slate and ash ingredl-
ents and 80 per cent. of the sulphur,
rendering the coal more fit for Sas-
making and coking.
An immense dockyard is to b. con-
structed at Antwerp to cope with the
eXigencies of the rapidly increasing
shipping trade of that port
When completed it will cover
no less than ca acres. The
scheme has received the financial sup
port of the most prominent shipping
owners in Germany.
1t has long been known that there
were Iron ore deposits east of BlWa-
blk. in the Mesaba Range, in Mime
sofa, but owing to their apparent
small size and the large deposits dis
covered to the west, they have been
neglected, and little prospecting has
been done in this region of late years.
Ten or 10 years ago, however, the re-
Eion was carefully examined by
number of experts and passed by for
apparently more promising mines.
The Minnesota correspondent of the
Engineering and Mining Journal now
reports the discovery in this region OF
an ore body mile long and Il half
mile wide under but so feet of sur
face, and that large mining COM
pany has already secured an option
on the property.
Workmen in steel works are occao
slonally poisoned by water-gaS, OF
which carbon monoXide is Il large
constituent. A treatment for such
cases has been the TRANSMISSION of
blood, and now in its place NJ. A. Mos
so, in the Complies Rendu of the Paris
Academy of Science, has suggested
that the Victim be placed in an at
mosphere which contains oxygen at
considerable pressure. In experiments
on two monkeys, poisoned with car
'SAi AAAphO-Nlutt IL W as IOuutl tilslA ihS
one subjected to this treatment, which
involved being placed in an atmos-
pherc containing oxygen at pressure
of 30 pounds to the square inch, COM
plctely recovered in half an hour,
while the other animal. which had
been left to its own resources, died.
A sawmill run by electricity began
operations recently in Oregon and
seems to have been successful The
electricity is generated by water
power, the water being fiumed from a
small stream which runs Il 50-horse-
power waterwheel, in connection with
which is a dynamo to generate the
current to run the mill. Wires are
strung from the power-house to the
sawmill and are attached to the saws
and other machinery of the mill. A
feature of the electric sawmil is that
the carriage is above the log and car
ries two saws, which are SO fixed as
to cut both ways, making two cuts at
the same time. This arrangement al
lows the saws to cut going both ways,
and obviates the necessity of having
to bring the carriage back and begin
cutting at the same end of the log
each time. 1t is claimed that the mill
will cut any lumber or logs at one
half the cost of other mills
Up to the present there have been
two general methods for operating
railroad switches from central
tower. The most common and old
est of these is by means of manual
levers in the tower, mechanically con-
nected to the track switch by Il sys-
TEN of rods chains, or wires. The
second system, known as the electro
pneumatic, consists of electro-mag-
nets, controlled from the central tower
operating valves which in their turn
control the compressed air used to
change the switches and signals. Now
there comes a new system, the "all-
electric" as it has been named, which
consists simply of small electro mo-
tor at each switch whose action is
governed from the central tower. The
only connection necessary is the two
wires of the motor circuit. This sys-
TEN has recently been installed in
several railroad yards in Chicago, and
is giving satisfaction. The practical
perfection of the whole apparatus,
which in theory is so simple, and es-
pecially of the electric interlocking
machine in the tower. is the result of
several years experimental work.