Watertown republican. [volume] (Watertown, Wis.) 1860-1906, 1883-04-18

luloId, and has the advantage of being
fire-proof. solution is prepared OF
200 parts of casein Id so parts OF nmo-
MIA and 400 of water. 70 this the fol
lowing are added: Quick-hme, 24O
parts: acetate of alumlna, 100 parts;
alum, so parts; sulphate OF lime, l, 200
parts; oil, 100 parts-the oil to be mixed
in the last. When the mixture has been
we'll kneaded together and made into a
smooth paste it is passed through rollers
to form plates of the desired shape.
These are dried and pressed into metallic
molds previously heated, or they may be
reduced to very fne powder, which is
introduced into the heated molds and
submitted to strong pressure. The
objects are afterwards dipped into the
following bath: Water, 100 parts; white
glue, parts; phosphoric acid, 10 parts.
They are then dried, vanished, and pol
ished with shellac. -Scaentjfc AD1eTi-
can.
is COPPER POISONOUS.
In this age of rehabilitations one is
hardly surprised to find the poisons-
or what were deemed to be poisons-
meeting with partisans. M. Galippe,
French savant, has undertaken to clear
copper from the unjust imputation under
which it has labored of possessing toxic
properties. He has been experimenting
since 1875 upon dogs with verdigris,
bluestone, and various salts of copper,
and he has come to the conclusion that
cooper cannot cause fatal poisoning"
And on its being objected that the emetic
effects of these substances probably
10,
particularly susceptible to the action OF
emetlcs-he courageously proceeds to
try similar experiments on himself, hav
ing all his food regularly cooked In cop
per vessels coated inside with verdigrIs,
and he feels none the worse for 1t.
Furthermore, he has over and oven again
found copper in the liver and kidneys of
persons who have died from natural
causes, and his analysis of wheat, choc
olate, and other alimentary substances
have revealed the presence of minutes
imal quantities of copper In their cOmpO-
sition. These are facts, he says, which
should not be lost sight of In making
post-mortems of persons whose death
has been attributed to metallic poison
lug, and he believes that ignorance of
them has led to more than one sad judi
cial error.-St. James Gazette.
GAS FOR NOTHING AT PROFIT.
Scientific prophets have foretold that
a day will come when the residual prod
ucts" resulting from distilling coal will
be so valuable as to reduce the price of
gas to a mere nothing. That good time
has not arrived, it must be confessed,
but, if we may believe the confident as
Of a.
is already In existence an appliance which
goes long way towards fulfilling these
predictions. He claims to know a pecu-
liar description OF oven for making coke,
which, without the help of high Chin
ney, enables those who use it to drive
steam-eugines without any expense for
fuel. Every ton of coal consumed in the
oven yields coke worth seven shillipgs,
and tar and ammonia worth four shil-
lngs. in addition to Ia, 900 feet of gas.
IF, therefore, the first two products are
sold, the price-11 shillings-more than
pays for the slack coal from which they
were derived, as we'll as for labor, wear
and tear, and interest on the capital
sunk in the plant. The manufacturer
gets Ia, 900 feet of gas for nothing from
every ton of coal subjected to the pro-
cess, and this he can use instead of fuel
to generate steam. It is certainly bold
claim to put forward, but it may, per-
haps, be justified by the present prices
of coke, ammonia and tar. If, however,
these ovens come into general use, the
market value of such products will as
suredly fall heavily in proportion to the
immense enhancement of sapply, andin
that case the prices fetched would not
cover the cost OF materials and labor
London Globe.