The Baltimore County union. [volume] (Towsontown, Md.) 1865-1909, 1900-12-29
Jurisprudence Baltimore County Union.
SCIENTIFIC MISCELLANY.


mental Materials From Waste-Elec-
5nerapy-An Effective Filter-Acety-
black-Ice in the Tropics-A Stereo-
pic View of the Moon-Strange Sea
ptns--A Volcanoes Lights-Russian
monds.
metal waste of machine shops is utilized
Appart, OF Junet, Belgium, by cleansing
I'd impurities, and then pressing into moulds
ana raising to the welding temperature by a
powerful electric current. When hot the metal
is compressed by means of die. The roughly
shaped product can be finished in the usual way
nd if the filings OF different metals are used
cry decorative effects are produced. A simi-
ar plan has been proposed for using the waste
~.xture of glass powder and abrasves that col
os tn English glass-grinding works. Inc
ass bhQds the particles OF sand, etc., together
men se&mi-fused at a bright red heat, and a
ara, tokugh block is formed. Greater attrac-
VeneTs may be given by adding powdered Wit
0ous Anamels or metal filings.
4"a
mpt cures in certain forms of disease are
ri ted by DR.. D. A. Kessler from the use OF
candescent lamp of 16 to 100 candle-power
u lamps provided with parabolic reflector
prope %~era. and connected to battery or
strtet-curreft supply. The treatment is
the severity of the pain. The light and heat
US combined very quickly relies pain, cause
emorrha9ic effusions c'black and blne' marks)
o be rapidly absorbed, reduce the time of treat
nent of eczema, and have no equal in cases of
Icute rheumatism. The appearance Of pers-
piration is a signal to close the sitting. Care is
4 taken to avoid exposure to cold of the treated
part.
Coal slack has been brought to the consider
alton Of the Sydney Water Board altering
material through the conclusions of Prof. Bos-
c2k Hill. This expert has found coal to be
EIe or ballast IN purifying sewage,
A1at osce a chemical action, and its puri-
cni Jlyeris marked from the first day of use,
o On still better results follow after two or
CHnths.
enc Is readily decomposed into its ele-
met carbon and hydrogen, and the finely
divided and absolutely pure carbon liberated is
superior to the best lampback. French en-
gineer, NJ. Habon, therefore suggests the use of
the unsaleable quality Of calcium carbide, that
is always waste product of carbide factories,
for acetylene black. The manufacture consists
in forcing the acetylene from this low-grade
carbide into explosion vessel filed with hy-
drogen, until pressure of about rs pounds is
obtained, and then exploding the mixture by
raising platinum wire within the vessel to a
white heat The pressure reached during the
qsssesfon is prevented, by the diution with by
drogen, from exceeding $40 pounds per square
inch. Each cubic foot of acetylene yields one
ounce of acetylene black and one cubic foot of
pure hydrogen, and the latter may find ready
sale.
Ice is sometimes formed in India, when the
$40
water at night in earthenware pans resting on
rice straw in little hollews in the ground. An
ice industry depending on the same principle
has been discovered by o. H. Howarth at an
alton of 5000 or 1900 feet in a valley of
ga, Mexico. A large number of shallow
n troughs are filed with water, and dur
inter- nights become covered with thin
never exceeding an eighth of an inch in
ess-of ice, which is collected and buried
siderable masses in the earth. In these
pitce consoidates, being then cut when
nend carried to the towns mules.
-.
some remarkable lunar photographs
e, Messrs. Loewy and Puiseaux, of the
of Paris, is a stereoscopic image of
eS hemisphere of the moon, the direc-
!. light giving relief and showing very
~ the details of craters and mountain
plate of the moon at 10 days and another
days, enlarging these to sixty times, and
fully placing side by side.
"a
Id watch made in Berlin is said to be less
lquarter of inch in diameter, weighing
an two grains, and to be a good time
oration of the depths of the Black Sea
the last ten years has brought to light
ue condition. Sir John Murray states
e greatest depth found is LOO fathoms,
gdrface current flows
Sbosporus and Dardanelles
mean, while salt undercur-
al flowing inward. The density of
water of the undercurrent prevents
Gle circulation. The greater depths
02ently quite stagnant, and they are so inn
hated with sulphurated hydrogen that no
Is possible beyond 100 fathoms. Water from
pth of 800 fathoms smells just like rotten
s. Thus the bottom deposits, unlike those
the open oceans, are barren of life; and they
W the further extraordinary difference, I'M
yn elsewhere, of an abundant chemical pre-
ate of carbonate of lime.
-
AN eruption of the New Zealand volcano of
Mari, DR.. D. Friedlander reports having wit
liz the reflection of incandescent matter upon
lark clouds, large number of red-hot boul-
rs, which were shot high up and fell down in
.rabolic curves; lightning, due to electricity
soduced by friction and blue and probably
eddish flames. The eruption began with an ex
lplosion. masses of ash-laden steam being ejec-
nd. The electricity resulted from friction of
coarse ashes in the steam and it is suggested
she blue flames were due to the burning of
orized sulphur.
-.
The probable existence of diamonds in Rus
STA, on the western slopes of the Ural Mountains.
ras suggested by Humboldt. The first stone
as found in 1929 and between 1880 and 1885
early fifty were discovered, ranging in size
o. one-fourth to three-fourths of a caret.
diamonds have been found occasionally
>although no thorough search has been
lie.
Cutting of obstructing vegetation on the
PIPER Nile has had the astonishing effect of de-
roying enormous numbers of fish. This has
en- due to the liberation of stagnant water
ich has suffocated through its lack of air.
rsonally Conducted Tours via Pennsyl-
pia Railroad-Season of 1ooo1eo1.
Pennsylvania r. r. Company announces
lowing personally conducted tours for the
of 19O0-19Ol:
1rnia.-A thirty -ive-day tour will leave
W York, Philadelphia, Harrisburg and Pitts
rg February IA. The party will travel over
entire route by the "Golden Gate Special"
finest train that crosses the continent.