Delaware state journal. [volume] (Wilmington, Del.) 1870-1883, 1881-06-02
SCiIsNTIFIC MISCELLANY.


ensure perfect safety, rs pork cooked to
the degree known as rare may still
contain the living parasites So much
| dreaded.
A French electrician, NJ. Cattle, has
Investigated the peculiar sounds which
interfere with messages sent on telephone
lines. lie finds that the sounds are largely
due to the vibration of the telephone
wires by the wind. The sounds are
doubtless often produced by the inductive
action of electric currents passing over
neighboring telegraph wires hut this is
far from being the only cause, as has been
generally believed.
There We're sanitarans in the days of
our ancestors. So long as 500 years ago,
in the time of Richard H., an ordinance
was enacted torhidding the pollution of
rivers, drains, Ne; another in the reign
OF Edward H., against selling "muzzled
swine-tlesh," &c. and in the reigns of
Henry W., and Henry VII. and Elizabeth,
for the inspection and cleansing of sewers,
against the slaughterng of cattle in towns
and against the overcrowding of dwell
ings.
An ingenious illustration of the incon-
ceivable distance of the stars from the
earth was recently riven Inv prof Rail nf
Dublin. "If Won s,lppose n said he .so
railway from tb. earth IN tb,, naarast
fixed star. which IL sunnospl tn ba
~, ZOO, 900, 600 of miles from us, and if
you suppose the price of the fare to be
one penny for every hundred miles--not,
mind, penny per mile-then il you
took mass Of gold to the ticket Office
equal to the national debt, it would not
be sufficient to pay for a ticket to the
nearest fixed star"
A German naturalist has contr,stad IA.
behayior of ditf.rp,u animaIs touarJs
steam naehipery. That proverhiollv stnnid
animal. the OK stands comnosedly m, ih.
rails in front of n locomtivn without
having anv idcn of III. d,ng.r viii,
threatens him. dogs RIM AIMING thn
wheels of d.nort;ng roil,r,,, tra;, ,,ith
ont SUFFERING anv iniIrv and iirds s.a,,
to have n peenliar 5.licht in Tia etsa,n
engine. Larks often build their nests md
rear their young und.r tbe sw;trbas nf
railway over which heavy trains ar,
constantly rolling. and SWALLOWS
make their homes in engine houses.
A pair of swallows have reared
| their Young for wears in n, mill
where u noisy 300 horse power engine is
working night and day, and another
| pair have built their nest in the paddle
| box of steamer.
A corresnond.nt of an E,,,;sh ;onrpol
a,snrts that La hoe hi,me.lf nl,Y.,n,,,J t,,,1,
sn;d.r sLn,.,,r. H., xii ,'r '.','.'..'.''...
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,,a., nis.aa,n1 , ,. iJe Hte s ..l
triongnlar rail TONS with a r;hbnn-lil.a a
ladder of gossamer. along which ran the
spders."
cor,,la os hora,, h,lia,,ar l., .,,oI,,
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Ihe Ielllng VI ioreSts is kii"Mh 10 pe
the cause OF the drying up OF many a
stream, even large rivers having been
made to totally disappear through the
influence upon the climate oil ciearlnG
the land from wood. The classic lands
OF antiquity abound with sad lessons oi
detorestation. The springs ana brooks oi
Palestine are dry ana the SOIL mas lost lts
fruitfulness. The Jordan Is tonr lee'
fruitfulness of Sardinia and Sicily, once
| tbp urnuarips of ltnly. has ulSlpuplrpu