New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1877-05-12
THE SPEAKING TELEPHONE.

PRIVATE EXHIBITION or THE INSTRUMENT IN THIS
cTTy-coyvERsATToN BETWEEN NEw-YORX AND
BRcoKLYN-PROF. A. GRAHAM BILL EXPLAINS
HIS INVENTION.
An exhibition of the speaking telephone was
rycp last night Mt the ST. Dsnis Hotel in this city An
invitation 10 exhibit the instrument here had Deeh Ten
dcrcd to Prof A. Graham Bell by Prof i. A. r. Barnard
DIR. Howard Crosby, Prof Henry Norton AMI two or
three dozen other gentlemen eminent In the learned pro-
frssous or connected with elegraphy Before beginning
Lis proposed course Of lectures, Prot Bell Invited rev
Of his scientific friends to be present at an Informal
exhibition to show the powers OF the Instrument Aoouo
80 gentlemen were gathered in Of the pariors Of the
~ mis- Hotel last evening Among those present were
4trcs,icnt Barnard Prof o. ~ Rood, and Prof j. s.
Nrvberry Of Columbia College the Rev. Dr. Armtage'
Cen Eckert President OF the Atlantic end Pacific and
the Hon n ~ Gibbs President. Of the Domestic Tele
graph Company Prof. Poet 81 tho Dear ana DUNN
Asylum Eastman Johnson. Gen. Gaylord, s. A. Bunce'
r. II. McCurdy, L. o. Evans, and other WeIi-khoWn
citizens.
There was some delay about the proceedings which
was aftcrV,ard explained Prof. Barnard introduced
Prof. Bell TO the audience having become acquainted
with the instrument and the inventor at Philadelphia.
Prof Barnard stated that Of all the instruments OF pre-
cision and research &C. which the group Of Centennial
Judges OF which he chairman was called upon 70 ex-
ANNE there was that occasoned greater interest
or tnat they regarded Of higher novelty ma I'M
portance than the speaking telephone OF Prof a era
ham Bell In Introducing Prof Bell to the audience.
Prof Barnard said that ne did 20 with IN" CONVICTION
that the name of the inventor OF the telephone would be-
handed down 10 posterity with a permanent claim Oh
the gratitude and remembrance Of mankind.
Prof Bell expressed himself "a surprised at the sizo
and importance OF the GATHERING He had at first ex-
peced ONLY small number of is friends and had ar
ranged exhibit his telephone merely by placing one OF
the Instruments in room and another IN another
room in the hotel, connecting them by wires But at
late hOur be had determined upon more complete OK
hibfon OF the character Of tho Instrument, and had
therefore his assistant Mr. Cover 20 Brooklyn ana
hoped before long hear that Mr. Cover had arrived
some where in that city-to hear il from Mr. Cover,
through tie telephone Willie Prof. Bell speaking,
a sound heard from thc instrument he placed hs ear
against it, and after istenngfOra moment, said to the a-
dtcnce II is al rght. Mr. Cover has been IN se2rch OF
acornet-Bayer and thinks lie viii have one TO play
tune for us" Prof Bel then carried on OrlaI ooFcfsa-
tion with Mr. Cover. finally desiring TIE lttrr - pc m
readiness after short interval IN which Prof lei pro-
posed to explain some features 0i me aLlon. 80 up
audiruce. Prof.. Bell mentioned many OF ne lacs "lth
which orr readers are 9gtady familiar as 70 the con-
structiOn ami character Of the Instrument Hhcu u-
net approaches bar Of iron IL generates current OF
Sr i"cL il Generate. tho converse electricity. c.
in the one case positive IN the other negative. What
ron Tor me oar 20 maze Una. nory I6o yibra
OF the poles Of the magnet ny the waves
of sound striking on tue plate These duettGces o posi-
wire caused naguct 40 the other end OF hc Tre 70 a.
tra. or r,pel precisely similar non pate ana Tie VI
blus Il that, Communicated 20 the ar, were SOUNDS
corresponding 70 those presented 20 te hist
ull-e He has tested II 2J- miles or Nlie between
Np;v-YJli aud Boston lie commenced Do understanding
n u,.y hg docs rot understand g. lLc vibration Was
,ft.u.s. be like that OF membrane -ucn as Us MAJ
mo drl'l Of the But we al knew
tgJi such vibration gan be readily mPthed
hy .lStcus 4uU the membrane Something TO s.lHrl IT,
Tur., wa, u0 such result with the telephone" Nhth
wooden ing was screwed to tpe plate. or when the llae
itself was made OF extraordinary thickness, inc FH-
Z. .I
h. ,rrulal The ciTius sounds 30 tlC 10 mo tccphCle
were described some Of them nat nrru "s'rrin,I 10
proceed from IN currents. Tho INSTRUMENT was more
Sensitive tEau yauou"t.r I'D certain Log, iiecilD' ia
lie wire, or iuutrtpt con tC'fiVu-.
The cornrt PLAYER at last arrived. lie was borrowed
for a bIlci period from tl orchestra OF Hel&hnoinE
tu.l;rr 10 .aycd tuI 8. the latter Ouc hch- very
distinctly heard Whom the Ir.r pN'ncu % SihS iEe
fundamental note OF telephone box. D. sounded 90
normally loud. Otherwise 10 was talr.y rendered Inc
ham m voice m Prof Bells instrument sounds very luri
us though it had come tlrou H very long -p'4Nl.s
u,t some practice ~ cers1Ty 20 eaten Ihc VOs Gt-
tered. tAt vibrations giving sort OF Confusing rtle.
Nevertheless the Ol tDe tran mission % hg"oH
Uog.,hr.
h..cr Prof Bel finished speaking the different mem
br.. ot she audience l..cnL 40 jhe inst. LWrni, Ald
some OF them cuugtisei U:n 5ir Cover Nto "''S5 me
Irc tal!i office, 40. 80 tuon-'t, brooklyn. -idc.l
laughter was 0ccasoucd by Pc9L BIZ -a.t ny te WORD
Fulton Uron- after asking Mr tIoWcl Were Lt Vas
Prot Bell unierst0Oi Hh iO sly BrdcoHSi, ltiiNs
having Boston IN his mind The propnciois of tAe
81 Denis Hotel invited the visitors 10 Iepast aIieI te
exhibition -