The New Orleans bulletin. [volume] (New Orleans [La.]) 1874-1876, 1876-01-23
SCIENTIFIC NOTES.

SCIENTIFIC NOTES.
There i no simpler remedy for preventing
cider growing sour than mustard seed. After
the cider has fermented and reached the de-
sired pslstable condition, put one pint mus
tard seed to barrel Of cider, and bung tight
very beautiful application of electro
metallurgy is to apply coat of silver by cleo
tro deposition on natural leaves and flowers
By this means very delicate ornaments are
produced, since tho precise form and texture
of the natural leaf are produced under the thin
silver film.
A new compound for polishing and clean
ing metals is composed OF l or. carbonate Of
ammonia dissolved in OF. water; with this is
mixed l6 o. Paris white. A moistened sponge
is dipped in the powder, and rubbed lightly
over tho surface Of the metal, after which the
powder is busted of, leaving fine brilliant
luster.
CONDENSED MILK FOB CHILDREN Ed
ward Smith, author Of an excellent work on
Foods" thinks that condensed milk is not
Q suitable food as q substitute for pure milk
for infants. It is more fattening but less
nourishing, and greatly reduces the child's
power Of resisting diseases. DR.. Smith states
that children brought up on impure London
fed cows milk will resist an attack Of acute
disease better than children fed on condensed
milk,
CLEANSING WATER MAINS. II It frequently
happens in iron mains that deposits Of rust
are formed, sufficiently thick to reduce mate
rally the diameter of the pipe. To clean the
Interior Mr.. E. Dodds, an English engineer,
has lately devised pipe scrapsr, which optr-
ates as follows The pipe is cut, the scraper
is inserted, temporary joints are made, and
the water is turned on at highest pressure,
which drives the scrsper on at great speed.
In the first experiment, q distance of 300 yards
of pipe was thoroughly cleansed in 2 minutes
and 20 seconds.
A NEW REFRIGERATOR CAR.-Very good sue
cess has been obtained in preserving grapes
by means of new refrigerator car which has
been recently tested on the Union Pacific
Road fan blower attached to one Of the
axles forces air through ice, and the blast
subsequently passes into the car through
perforated pipe at the bottom. After cifcu-
lating among the fruit, the current returns to
the blower and is again cooled. The advan-
tage is the uniform temperature OF about 40
degrees Fahrenheit, which is maintained in
side the car.
To obtain light instantly without the use of
matches, and without the danger Of setting
things on fire, take an oblong phial of the
dearest glass, put into it piece of phospho-
rus about the size of pea, upon which pour
some olive oil heated to the boiling point,
filing the phial about one-third tull, then
cork the phial tightly. To use it. remove the
cork and allow the air to enter the phial and
then recork it. The whole empty space in the
bottle will then become luminous, and the
light obtained will be equal to that Of lamp.
As soon as the light grows weak, its power
can be increased by opening the vial and al
lowing fresh supply OF air to enter. In win
ter it is sometimes necessary to heat the
;.iial between the hands to increase the
fuIdity Of the oil. Thus prepared, the phial
may be used for six months. This contrlv-
ance is now used by the watchmen Of Paris in
all magazines where explosive or inhammable
materials are stored.
Porcelain ware was originally manufactured
in China and Japan, but is now made in sew
eral European countries. 1t is the finest
species of earthsnware manufactured, and al.
though all earthenware which are white and
semi-transparent are called porcelains, they
differ much in their fneness and beauty. The
porcelain OF China is composed essentially Of
two ACKNOWLEDGEMENTS "a Chinese name
for fresh and undecomposed feldspar) ground
very fine, which is fusible-and kaolin-a va
riety of clay proceeding from the decompo-
sition of the mineral feldspar, which is
not fusible or at least not with the same
degree of heat which melts the petuntse;
and so in porcelain the substances
are only -vitriied, that is CONVEX ed into
glass, or one substance only is vitrifed, the
other not Hence porcelain is an intermedi-
ate substance between earth and glass. 1t was
because of this fact that kirwan called the
second degree of fu sib:lity the porcelain state;
kho 1our,o 10 ArnoIlasconca FOR IL might
be called the lowest), being that degree of
softness caused by heat in tasible body,
which alters its shape only. Porcelain is also
called Chinaware, from the country In which
it was first manufactured, and is not 80 hard,
being earthen, as stone ware is
JADE-A number of sales of Japanese and
Chinese curiosities have recently taken place
in this city, in which were included objects
made of q material little seen in this part Of
the world, and about which little is here
known. 1t is a precious stone valuable not
on account of its scarcity. because in China
and Burmah large mines of it exist, but for
the great difficulty encountered in cut
ting and carving it, necessitating an
amount of patience and manual dexterity
rarely found save among the inhabitants OF
the Celestial kingdom. It is silicate OF
alumnia called jade, and is obtained in Tar
tary, various parts of China and IN the Mo-
goung districts Of North Burmah. The true
jade is hard enough to cut glass or quartz
and the most valuable pieces are of an in
tensely bright green hue, the ordinary mate
rial being pink and yellow. As many as 1900
men are engaged in the jade mines of Bur
NAH, and the substance is sometimes found
in huge blocks, which three men can hardly
move The crude fragments are cut by means
Of thin copper disks, used in conjunction
with fine silicious grit, composed OF quartz
and little particles resembling ruby dust.
The boring Of earrings and bracelets is
Effected by a revolving cylinder tipped at the
free end with the same silicious mixture.
The Chinese, with their proverbial ingenuity.
make an almost perfect imitation OF ade out
of rice, the quality Of hardness alone being
absent
"CoMpos1ro" VESSELS FOR THE COAST SUR
rv-There Was recentlv launched at Balti-