Evening star. [volume] (Washington, D.C.) 1854-1972, 1879-06-21
EdiSOn'S Latest.

HIS L0UD-sPEAKING TELEPHONE ExHI BITED AT
THE FRANKLIN INSTITUTE.
Edisons late invention. the electro-chemi
cal. or loud-speaking. telephone, was exhibited
last evening, for the f1rst time In this country
at the closing spring meeting OF the franklin
institute, In their hall, on Seventh street,
shown in public before except once, within the
last few weeks, by Professor Tyndall, at the
Royal Institute In London.
~. !. An audience principally Of gentlemen filled
the c0mmodlouS iecture-roOm. A paper treat
Ing upon the principles involved In the con-
struction OF the instrument was read by Henry
N: Bentley, president Of the Philadelphia Local
periments with the improved telephone. The
invention, he said, was simply an attachment
OF the electro photograph receiver to the Edison
casion the rude box which Mr.. Edison had used
IN experimenting. II necessary, coil to
connteract Induction could also be attached.
Inc operation about to be exhibited, he said,
Woulo not pe SO satisfactory as what would be
SHOWN IN the early future, when an open and
peIiecteG instrument would take the place of
I HS,s ruae pox Which he had brought from MI.
Eaisons establishment on the previous eve.
ming. Mr. Bently slipped wheel OF chalk upon
an axle inside the little box, and as the trans
misslons were received from the Office of the
chestnut streets he continually turned a ana II
crank projecting from the box. This caused
.ne transmlSsions, which, under other circum-
tan 9 two n 40 1e heard T at distance
10 ne audible In all parts OF the hail.
orn ,s,t was as distinct as Ii the speaker
wnle dSt at tne other side OF board partition
MIN woe mterstlces between the boards and
Ine sound mad all the characteristics of his
voice TO show comparison OF voices. Mr.
tbe th several times called different speaker
"9ankle Doodle" "Sweet By-and- Eve" and
"Poor Little Buttercup" was particularly d,Si
unct ana accurately transmitted. The Soma
reaf u py sne audience Mr. Bently said, was
Two or tnree times as loud as that sent into the
tIansmltter; The playing of a cornet came
rather harshly and irregularly at first hut
w WI. Mr. Bentley had requested the performsr
ter, the music was almost as sattsfactorV as r.
the player, instead OF being nearly Ave s1nara.
away, were on the spot where Mr.. Rentiey
!inp and as o ~ the case Of the speaking whist
mat only partition fun of holes or wide crac,s
ttntervened between the performers and the lie
in e the Mr; Bentley saw no reason why people
concert H ,ature could not enjoy lecture or
saoaayIng AT nome with their 'selectro-chemicaI
I naepnones: Being asked how far such perfor.
reped t iuud qb oe transmitted he
n lansly answered, but he believed that thev
rniIne o NC meard at distance of one hundred
'Ailo f,i tS wen WI as they were heard now.
- ti!al or Violin music was not so succassfu,
as Ihat OF the cornet, probably becamse fna
ss 80 INC OF the former scattered more than that
" NJ me iaGter before entering the transm,ttar
ment was n eo9u r however that the instru-
nenertneless, could be Instantly disfingntShas
Is lhaI OF a violin. Singing was then trisS ,itf
If hanG Wsr success but It sounded little as
singer, or he had bad cold In the head " sue
tlnaie, cornet performance of some nf ptoo1
toIes HVellest airs came with astonishtn1 fts
we'll as - t anu accuracy, sounding almost as
and putting the audience int0 rho ba ~. ~,
mor.-[Phila. Times 'A0 0oS' VI hu-