Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1890-03-21
POPULAR SCIENCE.

In the purcst mir subjected to test for
tho causes which produce the dimming
effect Of haze there were about "a, 900
dust particles found in each cubic inch.
1t is said that ten per cent. Of alum,
added to plaster of paris while being
burned, renders it rs hard ms marble on
setting, aud capable of taking n flno
polish. '.f"t
Iodide of nitrogen is tho most scnsi.
two substance in existence, and when in
dry state explodcs from the weight of
fly descending upon it, or on boing
touched with feather.
rNSsss:2cr seh:sparclli, the cminont Mil
aneso astronomer, we'll known Cor his
researches on the canals of NaSSEs, Avs no
has asccrtained, after ten years SSsr,iis
CATION, TINT Mercury has rotation like
that of tho moon. ~
A new botanical garden in tho Alps
of Valnis is situated on a shaped
knoll about 200 feet high, at an alti-
tudc above sea-lovcl of moro than 5000
feet. Plants from all the alpine regions
of the globe will DO cultivated.
Tho French cavalry havo adopted.
small steel claws to be screwed into tho
horscshocs during the winter months
when tho roads arc frozen and slippery.
Two claws ara placed in each shoe, tho
mon being furnished with complete
set of eight.
Experiments OH tho mental powers of
hundreds of spiders have been mndc by
NIcssrs. q. w. and Il. G. Pcckhnm. Evil
dana tI,,t =.
fairly Developed in all but three out of
twcnty-six species, but tho position OF tho
organ OF smell WINS not found and Is not
known.
A member of tho California Micro
scopical Society, Mason Kline, of San
Francisco, has been making some re-
mnrkablc experiments, tho results of
which have caused the gentleman to do.
clare his belief i'll the hypothesis TINT I'LL
atoms, whether mineral, animal or vcgu-
table, nro male or female.
The average weight of tho mnlc brain
il forty-ninc and II hnlf ounces; of the
female forty-four ounccs-a difference Of
over five ounces. Womun's brain has n
higher specific gravity. The man has II
larger brain in proportion to stature
(MnrshnlD, but wonnn's brain Is larger
in proportion to her weight.
Recommended ms very strong cement
for iron is II mixture of equal parts of sui
phur and white lead with about ono
sixth part of bornX. When used, the
composition is wet with strong sulphuric
acid, anda thin layer is pressed between
the pieces of iron. In five dnys il will
be hard and appear like welding.
When Sir j. llcrschcl was defending
| tho character of astronomical science
in view of mn error Of nearly 4 900, 900
miles in estimating the suns distance,
| tho correction was shown to apply to
an error of observation so small ~ to DO
| equivalent To the apparent breadth Of II
human huir nj II distance Of l25 feet.
a letter from Port Spain, Trinidad,
| speaks OF The recently discovered curative
| qualities of plant locally known ns
cousin mahoc, whose botanic name is the
triumfctta scmitriloba. In cascs of dya-
pepsin, indigestion and liver complaints
the therapeutic effects Of this plant hive
been simply wonderful. The doctors on
tho island prescribe it largely, knowing
its valuable properties.
1t has been shown that the duration Of
n lightning ilasl is not inilnitcsnal, but
that the flash lasts II measurable time.
For example, If one sets cnncrn IN rapid
vibration and exposes in il II pluto 80 AZ
to receive the impression Of tho llush IL
il found that the impressions appear
widcncd out on the negative, showing
tllu ununtivn In hnyC innvrI flItriutr iLn
time the flash was in existence.