New-York tribune., 1878-06-29
SCIENCE FOR THE PEOPLE.

boring beetle. 4Ihe damage committed byt Hs'c"
Is sometimes very great, one nrm alone hANmS lo''
100000 worth of timber from their depFcda'iohs
An n single season. The beetles attack only
dead or decaviug trees into which they boic
e,ep oval tunnels tAat DESTROY their value
as lprshcr The eggs are laid ia the rough GREY
iess OF tie bark Ia few days the larvG hatch out and
begin 20 cut their into the heart Of the tree or log
The rasp.ng notes which they make in this Nork aie
rhythtcal and IN quiet forest remind the Listener OF
the tickigg Of clock in empty ROOM In afew weeks
the arva are fun grown and assume the puga form at
the closed end OF the tunnel which is near the bark
TIE bcotlcs soon and eut their way ont Ater
careful examination Professor Cook reaches the too"
ug rraci cal conciusious Trees kept green ana vg-
orus pec safe from attack p Trees burned or cut in
August are safe from injury during the same seasn but
should sawed or gOJ uto the water the next sphG
3. Trees cu' or killed before Auggsttu nctd &teuloh
ous damage. T. Trees can he saved. either 10y peel
rug OF toe bark or by Immersion III W9.eI o. Cu%tluE %
tual. rs Il the bark 10 peel Ch Dampaess Wlli
DESTROY the borers. but eXposcd 10 n9 hot Iays ="
only secures against the attack of the borr but helps 90
insare against fre IN case little pains is taken to re-
move the bark a short distance lOm the iOss
PHoroeRAPuING A FAST TEOTTER.-Mr.
Mnybridge Frauei-eo photoGra0her has just sue
ceeded in taking series o. instantaneous photographs
NJ fast trotter at fun speed Each pccre required
separate camera, with an improved double slide SO
worked by an electric current 10 give exceedingly
brief exposure when the horse was exactly opposite
TIE background formed by making screen OF
ranks angle Of about twenty degrees from the
perpendicular The surface whi,eued. and lines
were sretehed across at intervals Of twentyO inches
The track was also whtened for part Of the distance
aoros IT, and wires, connected with the double slides,
were run from the cameras opposite under the surface
unt within two feet Of the background where they were
wires correspouded with the lines on the background
On the opposite side OF the track the battery
ffa
numbered from one TO twelve As the horse rushed
past the wheel Of the sulY struck tle wires IN tapd
sneeessl0n, and IN less thar second twelve pictures
were taken, each representing the u3ter IN dneichJ
position and the vhOle forming Photographic repre-
sentatiOn OF q single stride.
SKELETON LEAvEs.-At a recent meeting OF
tho Scientific Committee OF the Royal British Horticul
turai Society some beautiful specimens Of skeleton
leaves we're shown the exhibitor stating that they
prepared in accordance with these general principles
For the dissection OF leaves maceratOu too long and
tedious TO say nothing Of the uncertainty as TO the
results The Of alka in saturated solution Is prefer
able the specimens be introduced while tho iquio is
heated TO boiling point The time Of immersion is to be
regulated nv the character Of the various leaves and the
nature OF the epderms be removed. When the sDeci
men il freed from epderm and cellular tissue It must
be subjected the action Of chlorine 70 destroy the col
orng matter The introduction OF peroxide of hydrogen
serves not only render the ace-Ae specimens purer
IN color but preserves also. In destroying the color
chlorine it gives soidy the bleached fronds, and
appcars to equaze the action Of the chlorine For ske
etonZIng capsules the slow process ~ mdcefaion by
sleeping in rainwater is aOne available moderate
heof may I've applied TO hasten the process. but akah
useless The only known flower which can be dlsseccd
Is the Hydrngea lapouiea The hDtons nature ol the
tas renders il easy scetonizs IN the perfect truss
n which it grows skeletOnized leaves and capsules
not possessed by them IN their natural state
PREVENTING SEA-SICKNRss.-Of the many
ApuOyanees to when the travelling public subject at
this particular season. seackness is perhaps, the most
distressing Aperfect for this malady would rob
ocean travel Of half it, terrors No drug, however
has been discovered which a specific The cause
OF the sickness largely n wholly, due TO the nyJ
uptary and unexpected motions 10 which the passenger
il subjected board ship These cause undue pressure
upcn the stomach and liver, and derange the acton
of those organs To prevent this, attention has recently
been called 90 an Old pan which is said to bc very sue
cessfu II consists regulating the act Of breathing
according the pitching rolling Of the vesseLdrawing
IN the breath she rises aud edthing ou as she falls
the trough waves After little experience The
ress mas fairly set in only thing 90 be done Is 10 get
rid Of The extra bile thrown into the circulation ana To
allsy the irritation OF the stomach For the latter
brandy Is the popular remedy. but cool eherVescmg
drinks are preferable In paftlcular, eIanPagne mas
sea- give the necessary tone and stimulus to the ys
TEN.
TIE METROPOLITAN RoAD.-The Scientific
American draws exaggerated picture OF the annoy
anees caused BY the Gilbert Elevated Road, lifts UP is
voice against tie deaenng racket of the trains as
they thunder over the rcsOunding iron BRIDGE" and
finally declares: "The only remedy for all these dan
gers aud nusances to sink the tracks This had to be
done and public opinion compelled it, tue Fourth
ave surface road and the present underground line -
grand success The Metropolitan Road put its iron
tunnel uuder ground well as above H. The present
grders which support the rails can serve as the roof
and the track can be laid the bottom Of the cut As
matters stand now, the citizens OF Newfork are fecey-
tng sparks DIRT stenehes, dea'cnng racket, dark.
damn and obstruced streets deprecated property dan
ger of trains leaving the track and danger from rnna-
yay horses below IN return valuable franchises for
which cent is paid, 90 hgh rates Of fare and for
the privilege OF being packed 10 cars ne cattle ahl
slowly transported over a limited portion or the CITY,
Meantime the officers are dong their Oest to remove an
reasonable grounds OF eompaihl ana IoauS
are altogether out Of the question:
FIRyPRooF CLoTHING.-M. Sieborath, of
Dresden, has been experimenting with view to find
some cheap substance that would prevent ladies' cloth
ing from burning with fame. Weak solutions Of alum
were not satisfactory but per cent solution OF Dhos-
phate Of ammonia proved quite snceessful the impreg-
mated clothes did not burn with flame, but were merely
destroyed by carbonzatiOn. Lastly, solution contain
ing per cent alum and per cent phosphate Of ammo
MIA was tried on linen and woollen stuGs Here, too,
there was no burning The stuGs treated with phosphate
of ammonia did burn when they had been Wig
ofously rubbed with gunpowder. the powder flashed.
nconbustihity, however, by getting wet or being
wasbed IL disadvantage, too, that they can only be
worn ia certain places.
GAS CIOTH-Dr. Hirzel, Of Leipsic, has
pateuted fabric claimed to be imperIneable 70 water
and gas which be calls gdseh or gas cloth 1t is made
by placing large smooth piece OF so-called guta-perena
naper between two pieces Of some not too and
dense rpateria-such az undresscd shrting-and then
passing the arrangement between heated rollers Tho
outer pieces shrting combine intimately with the in
ell sed euta-percha form material which s mpenc-
frbe by gas aud water. 10 may be made stll denser
and resistant by being coated on ooth sdes WIN
sosl lac The substance Is conveniently hexibe aud 1t
--u.ul.1 rrnnf net unI--hL lunnnucna OF