The Ohio Democrat. (Logan, O. [Ohio]) 1886-1906, 1890-05-03
SCIENCE AND INDUSTRY.


There are thirty-two compositions
on the market to prevent submarine
Rrowths on iron ships, and none Of them
do the work.
Black walnut picture frames are
made of paper and so colorcd that no
one can tell them from the original
wood.
1t is proposed to reduce cows milk
to dry powder, as being better for
transportation and superior to con-
densed milk. The idea originated in
Switzerland.
With the view of testing the rapid
ity of electric welding, twenty pieces
of one-inch common round iron bars
with rough ends we're recently welded
together by two men in thirteen min
utes.
The hydrocarbon process Of treat
ing iron so that it will not corrode is
said to cost less than one-half of that
of galvanizing, while the durability,
under similar conditions, is .onsidera-
bly, extended
Tho appliance of hydraulic power
to the manufacture of steel seamless
boats is one of the latest things in
England. These boats are thought to
be in every particular superior to those
made of wood and can be made at about
the same cost.
English rose growers are using blood
manure for their vines with great sue
cess. They take sixteen pounds of blood,
and as soon as it begins to putrefy, pour
with it four ounces of muriatic acid and
four ounces Of proto-sulphate OF iron,
previously mixed, which turns the blood
into dark, dry powder that will keep
for q long time.
From the investigations by Pro-
fessors Forster and dc Freytag sailing
or pickling seems to have very little
destructive power on many of the COM
moner forms of bacilli which may be
found in diseased meat. The bacilli of
typhoid, erysipelas, tubercle, and in
fictitious porcine diseases were found
alive after having been in pickle two
months.
The brick manufacturers of McKees-
port, Pa, and Pittsburgh are becoming
interested in patent chemical process
for making brick without the usual
burning which has always proved neces-
sary. 1t is claimed that the brick can
be made and hardened in two days at
cost of two dollars per thousand, or at
one-half of the average prico Another
feature is that the process will permit
the brick to be made in all colors, and
that tho hard article for street improve
ment can also be made.
In Africa, the palm-tree is cultivated
not only for it's fruit, but almost all
parts are useful for conversion to some
purpose or another. A very stringent
resin is produced from the cellulose or
fiber of the tree, which is made use Of
in pharmacy for healing wounds The
pollen of the male plant is made use of
in preparations for the skin, the roasted
stones of the dates are employed largely
as a substitute for chicory and even
coffee, while various pharmaceutical
and other products are obtained from
the roots, leaves and branches.
Cows hair, says an exchange, has
never been highly valued as a textile
production, but through recent inven-
tions that almost valueless substance
may take an important position among
the natural product ctions of the country.
For generations it has played an i'm
portant part in the mason's trade, and
when mixed with lime, sand and water
adds greatly to the mortar's sticking
powers. But it is likely to appear as a
rival of wool. and cows will be cultivated
for their hair, as well as for the present
manifold reasons