Clinch Valley news. [volume] (Jeffersonville, Va.) 18??-2019, 1891-10-09
POPULAR SCIENCE.

Systolc is the contraction of the hoart.
The opposite term is diastole.
Liquid oxygen turns out to be blue.
hitherto it has been described as color
less.
In tho city of Petersburg, Russia, it
begins to freeze at the cnd Of October,
and general thaw rarely takes place be-
fore tho beginning of April.
The French Society of Physiological
Psychology proposes to investigate the
phenomenon in which ono imagines ho
secs or hears an absent person.
A number of observations by two Ital
ian microscopists justify tho belief that
trees exert considerable influence in ill
tering out bacteria brought by the wind.
Sometimes spiders bite may DO both
unpleasant and serious. Au antidote
found efficacious is bruised pantaiu
leaves spread with cream and ofton TO-
moved.
The last complaint of the great gun
ships is that their weapons ofton miss
fire, owing to the failure OF the foot
long tube, containing the firing Charge,
to carry the spark.
A layer of compressed vegetable
parchment is being adopted by German
engineers as lining for bearings. Tho
parchment is imprcgnatod with mineral
oil after frequent fabrication, and lasts
long time.
Tho new equatorial telescope recently
mounted in Paris has its tube bent at n
right anglo and tho image of tho sky
formed by the object glass is reflected to
the eye of the observer. 1t is tho largest
of its kind in tho world, its optical pow
ers being very fine and tho images OF tho
planets remarkably distinct.
With tho introduction of smokcless
powders for rapid, fire guns charges will
result in Il decrease in tho size of tho
powder chamber aud a strengthening OF
the walls OF the chase. Smo&eless pow
der charges, even when smaller than
charges of ordinary powders, give tho
Same chamber pressure, but higher press.
ures oil along tho bore.
The base of celuloid is common pa
per; by action of sulphuric md nitric
acid it is changed to guncotton, then
dried, ground and mixed with from
twenty to forty per cent. OF camphor,
after which it is ground fine, colorcd
with powder colors, cast in sheets,
pressed very hard and at last baked be-
tween superhcatcd rollers.
AS is we'll known, sea md other water
fowl which are infested with tapeworms
probably get them from eating fish,
| al tnpn fail -
young worms. In proof OF this Y. B..
Itossitcr has announced to the Royal Mi
croscopical Society his finding among
the excavations of duck small, whit
ish ball, which turned out to BIO mass
of seventy or eighty tnpeworms.
Ordnance experts are coming to the
belief that the limit of weight of a rapid
fire projcctilo should be sixty pounds.
The 100-pound Armstrong rppid.tire pro-
jectilc is so heavy rs to necessitatc its
being loaded separate from the powder
charge. The 4.7-inch IIotchkiss rapid
fire gun uses projcctile weighing fifty
livc pounds, This calibrc has recently
been adopted for the French Navy.
A magnet carried by Newton in fin.
ger ring is said to have been capable of
rnising 749 grains, or about $50 times its
own weight OF three grains, and to have
been much admired in consequence. a
magnet formerly belonging to Sir Joha
Leslie, and now in the physical collcc.
tion at Edinburg, has still greater power,
however, weighing three and halt
grains and being able to support 1860
grains.
Lieutenant John +. Meigs, the gun
merry expert of the United Statos Navy,
plnces 1000 yards as the opening range
of single-ship actions. Lieutenant Meigs
declares that 1900 yards should be tho
range chosen for six-inca rifles when i,
is desired to do good work. Notwith.
standing tho immense range of modern
nGdnance, such raaye does not s.i,s,iT,
much better target work. 1t will be m
extremely difficult thing to hita moving
ship when distant 1000 yards.
The use of colored electric lamps is
largely on the increase. Not only aro
public buildings frequently illuminated
with lines and masses of vari-colored
light, but beautiful lamp effects are often
seen in the piazzas and the grounds of
private houses, especially in onjunction
with displays OF fireworks. It is quite a
convenience to be able to quickly trans.
form the ordinary plain glass incandc-
scent bulb into one of any required tint,
and the ability to do this is nov mt hand
In the shape of coloriny solutions of va
rlous shades which can be instantly ap-
Piled and MS quickly washed of when no
longer required.
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Tim E,rti, I,,rn