The Dallas daily herald. [volume] (Dallas, Tex.) 1873-1887, 1885-11-05
FACTS ABOUT SCIENCE.

y To make an ink black at tho time OF
writing, but whIch will disappear after
q short tiuoe, boil nut gals III sqda-
vito, put Roman vitriol and sal am
moniac TO it, aud when cold Dissolve g
little gum arsbl l.; il will, when written
with, vanish III "a hours.
A German paper says that 10 parts OF
paper pulp, 10 parts OF water, ono part
Of geiacine and Que part OF bichromato
OF potash, with 10 parts OF pho5phores-
cent powder, will make paper which
viii shine in the dark, and which will
be suitable for labels, signg, otc.
FrobRch has discovered a method of
making sugar without crushing or
pressing the cane. The cans Is cut into
strips and the water is extracted by
alcoholic Yapor, which Leaves the sac
chGrin0 to DO dissolved into liquid.
The alcohol and sugar are hiteros out
by meaua of lime and chalk. IT, is
clsimed that this process of manufSc-
ture will add one-third to the pro.
duction over sad above any process
now In uHe.
1t is easy 10 prevent rust within
SHOWCASES. IL Is welt known that the
rusting OF bright steal goods is due TO
the precipitation of atmospheric moist.
ure upon tho metal. THIS may be oh.
waited by keeping tho air surrounding
the goods Ia u dry condition, and q
saucer o. powdered guicklime placed
In an ordinary showcase will usually
suffice TO prevent the rusting of the
cutlery exhibited therein, ~ the lime
Will take up the moisture.
In the botanical garden at Berlin
flowers, fruits aud other parts OF
plants are preserved by keeping them
for time in q saturated solution o, al
cohol and sslicylic acid (reduoed by
four times it's bulk OF wsteD aud thun
removing and drying them. It is said
t0@t vegetable MISTER treated in this
Wev preserves itS natural appearance
and never turns black. The plan ia con-
sidertd particularly valuable for or
chids and other sucoulent plants.
This IL tho heavy season for piano
tuners. The heating up OF house un-
tunes In short time its piano. This
IL not duo, however, TO the expanding
or contracting OF the strings under the
variations OF temperature, but 10 the
variations produced Ia tho sounding
board undBr tho iniluono9 Of the IN
creased dfynosa OF the air whom fur
nNces and stoves sro burning. Tho
souuding'b0ard ~ always made OF
spruce, hscausa OF tho superior res.
ouSnc9 Of that timber; but spruce Is
tho wood most affected by changes in
moisture.
The bed OF tho ocean, says recent
writer, Is 30 an enormous extent GOV
eyad with lava aud pumioe stone. Still
moro remarkable ia IL TO fud the
floors Of the ocean covered in many
paris with the dust Of meienrites. BE.
tween Honolulu and Tahiti, ut y depth
OF 1850 fathOms-ever two miles aud n
hali--a vast layer OF thiu material
exists. Falling upon land this impslpa-
bio dust is Observation-Disclosures, but 40.
cumulatiug for centuries in tho ser
depths, ~ forms u wondrous story of
the continuous bombsrdment OF this
planet by como.ary bodies.
Lowell, Msssschus has fou,
chimneys over 200 feet ligh, Thu
MOrrimack company has two chin.
neys 2I3 feet sns 200 foot respectively
Glasgow, scotland, has n iiG.fOo,
chimney, not for smoke, but for chemi.
cal fumes, aud another chemical
chimney Of $50 feet, and Manchester
England, has one ofll5 feet. The Nor
rlmack compsuy's ~ the tsilest smoke
chimney IN tho world. Tho fremont
aud Suffolk company hss one 225 ieet
ard tho Lawrence company one 81
feot. The chimney OF the Pacific mills
Lawrouos, ~ 22I feot. That OF the
navy yard, of Boston, 2S0ls foot.
At the Melbourne exhibition Their,
| % A nnV,t.taia a sua1ttnty hAn0A ,,aa .
entirely OF paper, and furnished Will
walls, roofs, ceilingsc iloorirSs, 1oisti
pots, bedding, chairs, aofss aud lamps
even the stoves, In which bright fire.
were constantly burning daily, wer,
Of papior. mache. when The builder o
this mansion gave banquet, tn,
table cloths, napkins, plates, cups
ssucsrs, tumblers, craets, and eve,
the knives and forkr, were likcwis
msdc OF paper.
In the Gassttc Hebiom sdeire nj. VI
gler calls attention 10 the great pros
pccuve value Ia the arts OF a new prer
aration called petrobaseline. IL /
. clear, liquid hydro.s carbon, forme,
fro n vaseline by depriving 1t OF IS pe
cent. OF parafiine. IL In insoluble 4
water, and u doss not grease, yet
"iubrifles all bodies and preserve
them from oxidation" The write
calls u "a msrveieus agent, endowe
with the principal properties Of waite
alcOh0ss 9lyCefine and the Rxod oils.
IL eeelns destined 70 have many use
ana olrsaay pssfonefy has employ