Amador ledger., 1908-10-30

DNNAs
The new Ice-making apparatus Of
Prof. AnditlIen of Paris, is designed
for domestic use, and is so slmplified
especially by the elimination of
stuffing boxes to prevent leakage -
that it is claimed to use only third
as much power as ammonia machines,
while 1t requires no attention. Any
power can be used even a hand
crank for the smallest machines. Two
drums are mounted on single hollow
shaft, one end of which terminates
in the smaller drum while the other
end extends outside the larger drum
to carry a pulley. In the larger
drum, pump is attached to the
shaft, with weight to keep it up
right. Anhydrous sulphurous acid
circulates in the two drums, being
compressed by the pump into liquid
in the larger and evaporating into gas
as it escapes through tube into the
smaller. The expansion drum is
cooled, abstracting heat from its
surroundings, while the heat of com
pI pIession is radiated away from the
other drum. The expansion drum
can be enclosed in refrigerator box.
or placed in brine with metal con
tainers tor form ing ice, and ice cream
can be conveniently frozen in a can
in the cooled brine. The pump is
mounted in oil. which. like the acid,
the sealed drums retain.
Producer gas for power is used in
the United States by over 500 plants,
aggregating $50, 600 horse power, ac-
cording to l.. f. Jotman. The suction
producer. using anthracite, retains
fire for several days, and includes
the simple furnace in which the coal
is partially burned, while other
apparatus cleanses and coois the gas
from the imperfect combustion as it
passes on to the gas-engine. The sys-
tenn is claimed to be almost auto
matte in operation, very economical
and absolutely safe, while there is no
smoke and smokes stacks are not
needed.
Electrically produced ozone is used
in Germany for purifying the drink
ing water of the cities of Berlin,
Paderborn and Wiesbaden. The
ozonizer, supported on hollow iron
posts, is an iron tank partly filled
with water, with three glass tubes
passing vertically from the air out
side through tight joints in the
bottom of the tank to the space
above the water. An aluminium
cylinder partially fills each tube. A
current OF 5000 volts is used, the
aluminium forming the positive and
the tank the negative, and as air is
passed through the tubes 1t is ozonlz-
ed by silent q discharge between the
aluminium and the glass. The ozone
produced is led to sterilizing towers.
where it is brought into contact with
the water trlckling down through
gravel. Nearly all bacteria are
destroyed, including all Of typhoid
or chloera, and those that remain are
harmless. Inc disagreeable taste and
odor disappear as the ozonized water
passes through a masonry conduit on
the way to the consumer.
Some experiments by naturalists OF
East Prussia have shown the possibil-
ity of tracing the migrations Of birds,
and that such miGratlnns may extend
to distances hitherto unsuspected
Many birds captu1ed two years ago
we're released after being tagged with
light t9Qt-rings bearing record num-
hrs and the dates. Some Of these
marked birds have been reported
from far away, a lake fowl, with
ring dated July 26, 1907, having been
shot in Tunis, while stork, with
riug dated July s, 1907, was killed
far south of the equator, near Fort
Jameson. Rhodesia. That stork
would travel from NoIth Germany to
Southern Africa was revelation.
The uviol lamps mercury vapnr
lamp producing abundant ultraviolet
rays s. is used for bleaching linse cd
oil at Laugelsheim, Germany. Twenty
lamps are immersed in a ton of crude
Oil, at l76 degrees f., air being intro
duced in Hue bu bibles. aud the ultra
violet rays cause the oil to absorb
one-twentieth of its weight of oxygen,
becoming clear aud colorless. One
horsepower hour of energy bleaches
seven tons of oil.