The weekly messenger. [volume] (St. Martinsville [i.e. St. Martinville] La.) 1886-1948, 1889-06-22
SCIENTIFIC AND INDUSTRIAL.

A flash-light signal for rear of trains is
being tested in England.
Science is now able to inspect the
molecule in its ultimate condition.
The English law recognizes the need of
revaccination after twelve years of age.
The sounds of the heart have been re-
corded and reproduced by the phono-
graph.
The waters OF Salt Lake are not as salty
as they were twenty-five years ago by
thirty per cent.
y putty of starch and chloride of zinc
hardens quickly, and lasts as stopper
of holes in metals for months.
There is a great increase in the con-
sumption of African lakewood, on ac-
count of its property of preserving from
rust iron or steel that is in contact with
it.
The saw is largely used now instead of
the AK in bringing down the. s.srt red
woods in California. The trs1 fssawed
partly through, and then is forced over by
wedges.
Major Powell states that material has
been gathered showing seventy-three
different stocks of languages and nearly
500 dia nets among the Indians of North
America.
Seamless boiler tubes are now made
from solid igots of metal by a process
that twists and scratches the fibres, and is
said to have tube much stronger than
the ordinary ones.
A French scientists has come to the
conclusion that we are traversing "cold
period" He notes that during the last
four years there has been a constant
diminution il the average mean tempera-
ture.
A good imitation of frosted glass may
be produced by applying to the glass a
saturated solution of alum in water. It
may be colored by the addition of aniline
dyes. The coloring is not very perma-
nent, however.
The simplest way TO fumigate room
is to heat an iron shovel very hot, and
then pour vinegar upon it, drop by drop.
The steam arising from this is disin-
fectant. Door or windows should be
opened that it may escape.
Gold miners might he interested in an
automatic and self-feeding gold amalgator
recently brought out in Baltimore, which
can be operated in connection with stamp
mills with a small quantity of water that
can be used over and over again.
To make acherry stain, mix together by
stirring one quart OF spirits of tHpentine,
one pint of japan, one pound of Venetian
red ground in oil, and two ounces of dry
burned lumber. Apply with a brush and
wipe off with cloth. Finish with one
Iron pipes lined with glass are reported
to have withstood satisfactorily the
severe test of having boiling water pass
through them, followed Immediately ~
water at q temperature OF thirty-threc de-
grees Fahrenheit. Subsequently, exami-
nation showed no cracking or damage to
the glass.
Some railroad managers propose TO put
down 100-pound rails and run eighty
ton engines and use thirty-ton freight
cars, with air brakes, in order to make
more speed and reduce the cost of traffic.
One e:ghty-tOn locomotive has just been
turned out that has speed of seventy
miles an hour.
There are said to be more than 100,-
900 varieties OF butterflies. One of the
finest collections of butterflies in the world
is owned by Berthold Neumogen, of New
York. Only two others in the world can
compare with it. One of them is in the
British Museum and the other belongs to
public institution in Paris.