New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1880-11-19

FOR rnr MOVEMENT on = olM~-IhA MINhHAL
wrLuI OF UfAt pfs OBSERVATION-DISCLOSURES .
rrtF.cr VtcrUM-TIr oMGi% or A>IH':A-
c.Tt coal.
Papers read before the National Academy
OF Sciences Yesterday were iy Professors >. j.
Langley, Elias LOOMS. j. :. NewhcII1, ogden
n. Rood, T. Ste,Iy Hunt and c. II. /. Peters
Several of them were Of a popular character
and Two OF them, At l,a.t, ADD d TO scieulhc
knowl DE. The attendance N the afternoon
included a numtcr Of the students OF Column
bia College.
AN INSTRUMENT NEW 70 SCIENCE.
Professor : T. LsDgi occupied the attention
the Academy m ia. opening o. a." Wornih" Sos l"i
He read pai,-r- " o. th,Thcrnoi Balance ard "O9
Measurement Of Radiant Eae'gt.' When tn ihcr
NONE a. Is not sniff ientlg sensitive ior ocra an
ye.tiration in radIani heat. the speaker SAID
scientific men have been accustomed suoe The time
of Melloui to tine OF the ilornopl", an IhstiU-
Inent which. employed III connection VITA jc Eal-
yanometcr permits the making Of numerous import
ant measures l. h sHot been improved ma orally
in the last fifty yeas MrauVhil.. many pro 'iem.
OF both tlga Theoretical and practical interest
have ARISEN. which cannot be solved wit oui more
sensitive ana acc1ratc instrument. one OF these
problems j, tn measurement OF he distribution Of
have not passed through any prism. No accurate
results could dc oitriucd b. Professor Langley
with the ermopile. he was torccd TO invent "a
more sensitive instrument for TINS spccai uYc-iga-
ton and having done so, he beloved It would be OF
general ut llty. The principle Oi the new apparatus
has been applied by Dr. Slomens and others 10 other
purposes. Profess Langley spent several months
in making It, As be hoped useful working tool for
the physicist aud the physical astronomer. Ii j.
ola.
an electric current bo hoatoI loss electricity flows
through It han before Ii two a.ch w.res carving
equal currents from powerful battery meet
recording apparatus lLhe galyanumetcrl The index
OF the instruneui-puslod in two opposite WAYS by
exactly equal forces-wIll remain az rest, If one
current diminished BY warming ever 80 little the
wire which convey : ii, the other current gets the
upper hand and the index swings with force due
not directly to the feeble heat which warmed the
wire Dut the power OF tie battery when this
feeble heat controls
The application of this priocTle is thus
made: Iron or steel is rolled into
sheets of extrcme thlnness. The speaker SAID
he bad succe odcd IN rolling sheets of steel made at
the works OF Miller IL farkin, Ih5tSburg, Penn.
until Il took 1900 Of item to make the thickness Of
an inch. SpeciIo 8 OF these slees were exhibited.
together with patna. rolled at the United States
Mint IN PhIadelphla even thinner o. these sheets
fifty laid one on another did not together cGlal the
thickness of ilght tissue paper, MlDut" s;T1ps, !
1s2 oi an inch ami Il Of inch louG, cnt nom
THIS were united so a. to form prominent |
part of the circuit, through which !
current Of powerful battery pa SEED to the gaya- |
nomctr LxD rinent proved that an almost neon |
ceivab!y minute warming ~ set Of these sirips I
,roud r4,ce the rts.r- of tbp eiecfrjpif .o rs 10
i.' ,,r, - - .,,oo. 80, .La ,.gist.rtnor
- -, ! -, tol a. 81 n No.. g
ins''u'"cu'' L ~, -, -, 49, srnI 90; AZ
nls 'Ili,epss tu'N a. ne 49, a". " t,i
MS .a 80 'r, ~ f.,,..J -. ,,-, |
" 80, =. -, -. 80 IL. - ,,,rs III |
80; +ir,,,il,. irf m, : WIS airu,,st 81 sa.,,Yd.ty
aJva,,f,,,4 p ,,uosr,d wifi ms eteaf urcciso. and
r. = Inns a, "a winch H. - IA A. Tur tLrrtn-
mil. a. var. slow m MS action This new ius. rii-
80 tia I'm l., -larr. tske, mn ,I. hen. and |
,,erts rirh n o,rg Ia 81 st,,n Soc, II il almost
-" -, ~ 49,, ,,,-,.',, ...'. ,fs,.r
a. 'i','i' % ','o .''.."" b. r'" ,,,I,. ,., -,