The Cheyenne daily leader. [volume] (Cheyenne, Wyo.) 1870-1884, 1880-05-09
SCIENTIFIC -MI.cELLAxY.

by b aid OF spectrum analysis 50
dium has been detected in a solution
containing less than than the two-mIl-
lionth Of a grain.
After . long search, NJ. Broca de-
elares that he has been abe TO find no
skeleton save that Of the negro which
corresponds In proportions and outline
to that OF the statue Of the Apollo Bel
yedere.
Investigations lately made reveal the
fact that the number Of vibrations Of a
tuning fork is affected by the tempera-
ture, and that the higher the tone OF
the fork the greater becomes the infu-
ence Of the temperature.
An observer in England has found
that the depth OF dew-fall in that eoun-
try seldom exceeds the hundreth part
Of an inch during any night Of the year;
while the average annual depth Of the
deposit is not more than an inch and a
half.
A BRUSSELS genius has a plan for con-
structing a submarine apparatus for
travelling TO the North Pole. 1t is pre-
sumed that when the pole Is reached lac
win act on another hint from Jules Yer
ner's fertile Imagination and seek nm
opening To the centre of the earth.
Mr.. NJ. A. vedder finds that water Is
not freed from organic Impurities in
freezing. and that the germ o. animal
culae are present in very much OF the
Ice taken from stagnant water. This
being the case, considerable risk must
attend the use OF such ice in drinking
water.
Tronve's electrical polyscope wa re-
Gently placed In the stomach Of n fish
swimming in a Paris aquarium. With
out producing any sign Of inconyen-
fence, the body OF the fish was then illu-
minated by the apparatus, which caused
1t to radiate into the aquarium n light
equal to that OF a ommon candle.
Some w~oodcutters in Styria were sur
prised on TELLING n large oak to And in
its hollow trunk a human skeleton in
excellent preservation. II is ~conjec-
tnred that the bones aie those Of some
hunter who climbed the tree and slip
ped into the hole in the trunk, from
which he was unable to extricate him.
self.
NJ. Pasteur proposes inquiring into
the diseases and parasites OF the phyl-
oxera, with a view OF promoting their
increase. lie believes this to be the
most promising plan Ct DISCRIMINATING
the vineyard pest. II is a well-known
fact that microscopic parasites often
prove remarkably destructive to insect
life.
A school for the education OF idiots
has been in operation in Holland for
twenty-five years, with encouraging
results. or the the total Of All pupils
entered upon its register since 1855,
forty-three have gone directly into SER
vice or adopted n trade, while twenty
Ave others have been discharged In a
greatly improved condition.
During some recent experiments in
Glasgow 1t has been proved that tele-
phonic sounds a be conveyed through
n less facial conductor than the usual
unbroken wire. In this case a break
in the wire was taken up by n number
OF persons, who by joining hands con
tinued the electric current through
their bodies! The effect Of ,~nterposing
these human links was to diffuse and
weaken the electric power; but the cur
rent was still sufficient to convey some
audible reproduction Of asong from the
transmitting TO the receiving Of tele-
phone.
This simple method Of making q phos-
phorescent lamp Is given: Cleanse oys-
ter shells by well washing. expose them
TO n red heat for half an hour, separate
the cleanest parts. pull into n crucible
in alternate layers with sulphur. Then
heat to redness for at least an hour.
When cold break the mass, and sepa-
rate the whitest parts for use. II en-
closed in a bottle the figures Of a watch
may be seen by the aid OF the light
emitted. To renew the luminosity Of
the mass expose the bottle each day to
the sun or other strong light. The sui
phide Of calcium will thus be made to
absorb light, which will lie available
throughout the night.
In a paper on the origin Of the plow,
DIR. Taylor states that the first agricul'
tural implement seems to have been q
pointed stick four or five feet long, such
rs many savage tribes still carry fos the
purpose of digging roots, knocking
down fruits and unearthing animals.
At n later date the stick was bent and
used rs hoe, the point being hardened
by fire. In the southern part of Swe'
den large tracts of land give evidence
of early cultivation, which is attribu
ted to n prehistoric people called by the
natives 'the hackers" who are always
associated with the giants of mytholo.
Ky, and whose Iude hoe was n fir pole
with u short projecting branch. There
came into use afterwards u largeri nstru-
ment Of the kind, which was not used
like the hoe but dragged by men or oxen,
Instances of this are to be found in old