New-York daily tribune., 1866-02-17
The Registering Barometer and Thermometer,
THE LATE COLD TERM.

Al the last meeting Of the Poly ytecluic branch
Of the American Institute. diagram was exhibited Of
the record kent durng the recent cold tern by che Peg
isterne and Printing Barometer and Tlermomefer in.
vented bv G. W Hough. Director OF the Dudley Obsef
saory at Albany This diagram have Lad engraved
for the columns Of IHr Trutsr rs II viii areaty in.
terest the general reader a well a, scientific moa. OF
this invention Mr.. Timan the Chairman o. tie ioly.
technic meeting said
Itis the mos, valuable addition ever made io the
class Of measuring instruments used 10y philosopher
No human hand eve can be compared Wl!l 20 ioI nc
curacy ANY variation in the height OF ile barometer
col column exceeding the Orethrushutth part Of nn
inch recorded iu figures every quarter OF on hour
while ai the same time pencil moves across frFov-
ing cylinder aud 10y the up and down direction -o a
continuous hno connected view Of the changes ior
2f lonrs IL given. The electric curren is the motor
which moves this wonderful machine. Prot HOuph
has inst transmitted 10 tho Institute printed diagram
showing the comparative change q the barometer
and thermometer from the 9Th 20 the 10th % January
last The line marked shows tic course oi the bar
omeirical changes that marked 4 tie tAcrMoLeirica
changes The horizontal line represents The helgt of
the barometer 20 inches and o. the thermometer az
zero or a2o below TIE melting point OF Ice The PER
BendiculaT line. al the bottom measure each - lOAf,
commencing at on the itt ard ebdlg az noon ou
the 10Th.
The barometer shows that the mean pressure Of the
atnosphefe Is groatcst in the Winter and the smallest
in Summer II also shows that every - hour- there
are two periods Of greHtes and least pre- sHi known
as the InaXma and minima Inc ma1un.9 oi he
morning has formerly been t1ed n D. auH ~ MT a.
r Iut the more accurate and delicate rccordh Oi the
barometer Of Prof Hougb lead HIN to believe tlls pc
NOD is about aD hour carrier. Inc second maximum
was formerly supposed 10 occur at u minutes aiter 10
u IN and the Two minma Tespectively ~ a. min.
ntes after q. IN. and nve minutes ate Z. m
There are anomalies occurring ~ DufOMetrlc
changes nrslng from the fact thht az tht heat increases
The amount OF yapor ia the atmosphere also Increases
by which it, weight is augmented, thus cOuntcractng
10 a certain extent the tendcncs of heat 10 lessen the
pressure 4 discussion % these points would lead too
Ter from the subject directly before the Association
the Chair therefore proposed 10 read without lrther
comment the Interesting communication oi fTOi
BT referring 10 the annexed diagram IL will be seen
the maximum Of the thermometer was ai ID "a. on
rbe -th 600 iuchf.. equal 70 Jl.lu a. sea level,
while the minimum of tie tAcrmOn eter was, AT mid
night OF The 7th. j. OF ~ below he Hcellng point
II we neglect the small du-na variations OF the tier.
mometer We observe that tic two instruments move
in opposite directions Va. WbeL me piIe4Aetrf f-t-
the thermometer iHtlat j. an increased pressure D.
accompanied with a decrease oi temperature. ILs
TACT was shown In remarkable manner near midnight
of the nh of January when the thermometer suddenly
rose qbout one decree whereas, Lad the temperature
followed the ordinary duTLal noilon y should nave
continued % fall until o'clock The neXi morning.
The diagram showed that al midn GIT of tie IN The
h ROM ter fe smnl amount aftcr which IL continue 4
80 rise until j. o. OF tbc ch, Wien IL attained lht
maximum night, oO92 inches al this place or az J!u
hes reduced 10 the level of the 80 lar as has
sc, been ascertarcd this rs the greatest elevation ever
a'taned by the barometer in the Dted states. At
NJ lNaukec, Wis. tue barometer reduced 10 sea level
vas en- 3 inches AZ Al a. H. on The eth Dudley Observa-
tory time according tO observations furnished by H.
/ Lopham LII u. Al Toledo. p. II. Of the tn. The
barometer was 20 III inches reduced 10 5e1 cIel, &C
c0riug o Ob,e vatOnH furnished by DR. j. H. 1rrbey
TINS reduced 10 IA O. m, Dudley ObseryaioIy time.
from the variation Of pressure recorded here Wond
make tLC birometrca hight at maximum Jl2l inches.
/ At Mohawk ~. j.. ~ miles west OF Dudley Obnerfa
tor, the maximum occurred at 10 Il. IL AT New Aoik,
according 10 Mr.. Joseph Dixon observations N Jeise!
ICity the maximum barometer was Jlf Inches AZ sea
ileye These obscr1 alton, appear 10 show that the
wave Of cold and pressure was pIOpagatod ron me
North on North East, But in the absence Of sufficient
data these cOuicctuos are not OF mnch value. ~
hlbauy TIC thermometer was below zero i0i b1 con
ec,ufifc hOurs