New-York tribune., 1879-11-08

and from, all accounts with very satisfactory resnl
especially damp localities The ATTACK uI ,n's , ~ ~
upon the metal is little slower. hut the ensaVnk
sharper AMI cleaner. The solution ir me I"litv.d
: ~. of commctciai hchrumate OF potash w ,',c
i'm % oz If hot wattr after which L. OF Of snphnrW
acid of b. carefully added ana ins & ~no WV WV
uived This hath gels brown by usage " ait'r l'M
cays' ne IL becomes much IL must nc thrown aW"s
II Is necessary in order TO obtain so3u iess' rough
slightly the hath which l. done hv placing e lo"s
containing IL into bath of tepid waer Inc S"s' @ h
wording with chronic ac'd thus ooiru - annearS 70
cheaper a. with nitric. ana alt9Rctner u npI
have many features 10 recommend IL 10 chhoop''"
RABBIT ExTERMINAToRs.-Ihe increase Oh
rabhits in Zealand has great that II mas
been seriously proposed Introduce the weasel ana ne
polccat 10 keep down their excessive numu,rS' -"
"ExterminaIor," however. has been invented ""'o"
seems 10 effective II consists of n mhchine 'or s'
Grating aud forcing into the burrows carpoh'' "N,o
gas on reaching the flexible tube about hVe
feet i'm iength is inserted the hole and the gas is
forced into the aperture The entrance 10 the hnro"
then siopped aS well as all holes and assures tlat can
be found In few seconds great iubDun Is near" W,
side nj this quickly subsidies The bnrroW - uuR III" %
,fcr short me when the dead bodies OF the rahpllS
are iound huddcd together III every corner me '~'c
mmatOrs have teen pronounced Pe'''o' s"ooos''
Nrw COPYING PRoCEss-BOth here and in
England good deal of attention has been given L" "
new process for copying letters and other written docu
mcnts The original ls written with thick anilino INK
and when dry is laid upon elastic pad or SLAB con-
ssfin essentially of gcatine and cycernc When ire
parer is removed il is found that the ink adheres 10 the
slab aud Is capable OF reproducing by Fl ght rupmg
fifty or more copies without mixing Among recent
applications for patents in London Is the following po
cess which only differs I'm delails-not punciple-irom
previous The slab receive the transfer has Tor
its base u material known Leipsic printers roller
composition. This material is made In two qualities,
hard and SOFT It consists OF admixture of gea
tlne and gyccTine. These compositions in their two
qualities are combined produce the required elasti-
oiy and further To insnTe this an additional amount OF
glycerne may be added While the composition is In a
liquid state it being dissolved and kept liquid By means
OF hotwater bath Zinc white in fine powder is now
to be added gradually to the composition to give 1t
opacity and when thoroughly mixed alcohol Is added to
increase the attraction Of the composition Tor the ink
small proportion Of mmban oil GtrobonzoD must also
be- added The solution is then to be poured INTO moulds
10 form slabs Of the required and allowed to cool
The proportions Of the above materials which have been
found 20 answer well are folowsi
Tcpsc printers' roller composition thardl. 1I5 grim.
Lrinsic printers roller composition (soO.-. $50 grin
Giycerine %3V gt'
Zinc wnite. 300 grm
Mlbani oil tnitrobensoD grm
SUICIDE OF THE SCoRPIoN.-Mr Allen Thom-
SON. in letter published in Nature. writes that while
residing many years the baths OF Lucca In Italy
some friends much annoyed by small black scor-
pions Having been Informed that the scorpion wOu.d
destroy itself n exposed a sudden light his friends
soon became adopts In catching he scorpions and ds
posing of them This consisted in combining the animal
under an inverted drinking glass or tumbler. below
which n card was inserted when the capture
was made. and then, waiting TIL dark. suddenly
bringing the light OF candle near TO the
glass I'm which the animal was conhned No
sooner was this done than the scorpion invariably
showed signs OF great excitement running round and
round the OF the tumber with reckless velocity
for n number OF times. This state having lasted for
minute or more the animal suddenly became quiet. and
turning ts tail or the hinder part OF its body It's
back brought its reourved sting down upon the middle
OF the head piercing IL forciby, In few seconds
became quite motioness and IN fact. quite dead. Ihls
observation epeaed very frequently In truth,
was adopted as the best plan OF getting nd OF the
nnimals, and the young people were In the habit OF
handling the scorpions with mpunlty Immediately alter
they killed, aud OF preserving many OF them
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