New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1867-11-19
SCIENCE.

A NEW TELEGRAPn1C TuERNoNETEE'-tfGt
vieastope has devised new thrItnumetcr, which by
sac.I 10 distant places. The same principle Is applea
liz to trr Whole class of meteorological Instruments Ihe
sc~Uhc thermometer consists essentially VI two pafs
die firs isSle magnetic-nOtor, constructed on pan
sinar To- that used by the Inventor IA las hphaneueM
Iracptlc telegraph and Is ~ arranged that by turning
handle the lever at the other extremity OF the me VII
describe. by regular steps complete crelc me secou
equal EXPANSION Of two different netats u made 10 move
lever or pin around graduated cfs,e NhSh MAJ o
degrees ~ temperature The two parts are III snch VA
fIsy that the telrgraphc lever IN passing erouhu ny
circle must, az sOiuo point, cOFne ~ contact win
the min which Is moved iy means ~ the expanding or
contracting metals This contact breaks one circuit anu
completes afOthcr ana thus transmits the other *
trenty of the Geographic line information oi Tue pIC
nomeer Tie uses TO which this Geographic thGrnCn.
pter may he apDrd are arOng Others, the tOhoNIuE;
The thermometer may be placed on ISh "a it'll
On place not easily accessible for instance on luz
est pOnt OF Mount Blanc; aud III the valley Oh Hfh
MAY he fixed tie battery and terminal wires, W
lie Temperature at the top Of the mountain "a t S
msnner reports 81 trmpGfaine g, my Earth at which the
teunome'ris located. TINS & nStiaped by the
operator OF the telegraph. 49,
TrsT FOR FIXED AND VOLATILE OILs.-Mr.
Bruce Warner read before the British ASSoclauIh p"
ON the Electrical resisances c the hXed ana NOlu15
," in Which he SLOWS that difference OF resistance VIII
indicate the purity Of the oil uiHef s ~
process Is founded the discovery made many years h4
by NJ Rousseau Of France. that Give ol-the ieeDlSst
conductor of eectrcity-When ~ lNt WIN Que If
OF ITS volume of oil OK p"QcS te ,, I'll an
vibrations II magnetic needle III given tine Mheh
lie same included or maze u lOlm part '"
cnTrnt lie gives table Of TesiSanccS Of volatile ana
hred oils and remarks that the aduiterahts Vi Voa9
OILS are principally turpcntine ard alcohol compared
with any OF TIE essential oils turpeuhe has an lhihre
resistance, while tnat of alcohol 10 ENORMOUSLY lower hd
any Of them, except, perhaps That OF tue OF :"
hitter almonds, which low he Gtl NOT
measure an any OF his experiments The inportnCeo
this general fact at apparent since the aduon
eher az alcohol or turpeniine IN the smallest quantity Is
readily detected and the quantity IS denoted ny inc VAR
auOn IN tue dtfectOr either wh'n cuihpairu WIN
standard of known purity by Tie resistances thtl
selves Tue OiiS of lemon ana belgalnnt ~leh mIAou
with small proportion OF turpenne, do not however
show such marked differences rs tbs generally O1 sen
taal oils The effects produced ny mixing different r c
Hltps ~ the same oil together also prrcctibe mus
le German oils II peppermint foreign samples OF Nv
rSsstances Of tho volatile oils were dcte IN theHs
experiments hy the Of one CELL bt Tor tcsuHs iNtu
oils luttYtWO cells used Inc huthVl
innd t!.t bleached fixed oils pos-eSStd u
ieWer conducting power than unhleached OILS,
and the ljher,uce was very great III the case ol
olive OIL a singular difference existed between thc
Irpeu and Eat Ld.an castor Oils. which was 81 wlue
TAI very small per centage of added TO the other
rld be detected. COttOi-soel oil AID oil OF poppy, as
we'll rs turcEue rapidly altered IN thelt con
dEctirg power 10y eeCrOlySis, that there IL not inc
ssght.st difficulty In recognizing them IN samples OF OIL
olive oil when CUUisceO oil Or OH Oi POPPY s
it, resistance Increased by Identification; but II TIE
smallest quantity Of either OF theni exists IN sample {"
oave OIL produces a contrary encet hy a prolonged
contact with the battery. The author of this paper mas
MT however proposed amy plan for testing ois Nh'h
can be made Ui practical In commercial taisdet ouS
The purity u oils cannot he aSceraed readily ny thS or
any other plan far proposed. Al Instrument Tor
eis pucse adapted TO the use VI oil merchants Is NO"
great desidt1atun.