The Baltimore County union. [volume] (Towsontown, Md.) 1865-1909, 1906-06-02

SCIENTIFIC MI5CELLANY. 7
Photographic Prints in Colors-Alcohol
from Inorganic Observation-Disclosures
Paper-Headache VarietieB-The Lime
Lights Observation-Disclosures Footwear
A Chemical Lamp-The Heaviest So
1ution-Iron-Protect Copper.
A novelty of the iftieth annual exhibition Of
the London Royal Photographic Society was
demonstration of the three-color process called
sspinatype." This claimed to be the amateurs
method of color printing on paper, and In 1t
three prints in chromated gelatin are made from
the ordinary tree transparencies- trans
parency being the view photographed under
screen Of one primary color-and these prints
are each caused to absorb its proper color by
soaking in dye solution. The prepared paper
that is to bear the print is squeegeed on to each
Of these colored print plates in turn. 1t duly
absorbs the color, and thus the three colors are
transferred to single film. The results are
said to be of varying merit.
"a
Synthetic alcohol has been the subject of in
teresting experiments at factory near Paris.
When mixture Of coke, lime and various me-
tallic oxides was subjected to the heat of an
electric furnace, a carbide called ''ethylogene''
was produced, and by the action of water this
gave ethylene. Absorbed by sulphuric acid, the
ethyleno yields sulphonic acid, from which
alcohol Is obtained by distillation with water.
Produced at the same time are an ether, acetic
acid and aceton.
Tin-foil as a wrapping material for fatty
matters and other articles is being largely re-
placed in Germany by a kind of parchment
paper coated with aluminium. The aluminium
is made to adhere by rollers. and the so-called
aluminium paper is cheaper than tin-foil.
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The factories of Peru now produce 1850
pounds Of cocaine yearly, using 1900 tons Of
coca leaves. The cocaine contains TX to per
cent. Of impurities, and is purified on reaching
Hamburg. the chief market.
Ass
A physician finds that headaches are due to
three main causes. The first is a disordered
nervous system, and often results from the
worry and stress of life, never from properly
called work. Belonging to this class also is the
headache of anaemia, so common among young
girls of ill-nourished nervous systems and i'm
poverished blood. The second great cause is
Equestrian. which does not depend upon defec-
tive vision. but on faulty shapes of the eye
that overt taxes the muscle Of accommodation
and is to be corrected by proper glasses Head
ucuCo 4LOiu bulo cluccs uuilhc Obucfe, arc OAtcu
severe at night and absent in the morning. The
third kind of headache is due to poisons in the
blood, and its throbbings give evidence of too
high blood pressure resulting from disorders of
digestion due to over-eating of rich food, i'm
perfect mastication, or lack of exercise.
A new and simple French apparatus both
generates oxygen and automatically congresses
it. The gas is set free by the combustion within
the compression cylinder of combustible sub
stance mixed with potassium chlorate, and the
heat produced is sufficient to liberate the whole
Of the oxygen from the chorate, the largest
form of apparatus yielding 60 cubic feet of oxy-
gen per hour. The compressed product is in
tended for use with acetylene for a very power
full light. new oxyacetylene burner is en-
ployed. and this produces the very intense light
by allowing the jet to impinge upon suitable
mixture of rare earths, lime and magnesia being
too rapidly fused by the great heat.
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The chief Inconvenience of troops on the
march has been found by DR.. Hogyes to be
soreness from the leather of the shoes rather
than fatigue. He has therefore suggested an
inner sole or sock of asbestos and his hygienic
asbestos socks have been already adopted by the
Hungarian War Office, and are rapidly gaining
favor among the general public in many parts
Of Europe.
The ''uviol' lamp of DR.. o. Schott, German
physicist, is not designed to give either light or
heat, but is expected to give out ultraviolet
rays. The lamp, which is operated by passing
an electric current through it, is an exhausted
glass tube containing mercury vapor. The
radiation is of extremely short wavelength. and
about half of the rays are of the invisible ultra
IL
The rays have powerful chemical effects. It is
suggested that they may be found useful in
photography. in starting certain chemical re-
actions, and in testing dye-stuffs. and their
action is sufficient to kill flies or other small in
sects at a distance of half an inch in one minute
and to infict severe burns on the human skin In
five to fifteen minutes. The burns are not due
to heating The lamp is very destructive to
bacteria, with advantages over the Finsen lamp,
and its curative power in skin diseases is being
tested.
A very heavy liquid has been found valuable
in testing the specific gravity of solids. The
new solution of Duboin, French physicist,
contains sodium or lithium iodide in place of
the potassium iodide already used by Thoulet,
and is made by adding the alkaline iodide and
mercuric iodide alternately to small quantity
of water until saturation takes place, the tenn
perature being slightly raised. After "a hours
the liquid is filtered. The specific gravity of
Thoulet's solution was 3.190. while that of the
sodium mercuric iodide was 346, and the re-
fractive index also is considerably greater in
thelatter. The lithium solution is intermediate
between these two.
-.
Coating oxide of iron is the method by which
Herr Uthemann, engineer to the German adj
miraty, protects bilge and feed pipes of copper
or its alloys from corrosion. The discovery is
the outcome of elaborate experiments EXTEND
ing over more than two years.
O-