The New Orleans daily Democrat. [volume] (New Orleans, La.) 1877-1880, 1877-10-29
THE TELEPHONE.
INTERESTING EXPERIMENTS yESTEw.
DAY BETWEEN THIS CITY
AND GRETNA.

DAY BETWEEN THIS CITY
AND GRETNA.
Popular Airs, With BanJe AscompsMni-
psent, Heard Through Teiegrapf
Cabse, whieh II Spanning the
mississippi River.
Whsn, on the 1st OF April last, some Of on7
| city pspers pespetrased huge sell upon the pub
lie by an invitation to witness at GrunewAld Hall
and half dozen other places IN exhibition OF
Prof Bells telephone, or, more plainly speaking,
.. A rssKIsa TELssEApH,
IL was hardly considered possible that sach On
invention rsally existed. Considerable hsd been
said about il In the scientific journals Of tho
North, however, and tbs hoax perpetratea by
concerted action ON the part OF the reporters drew
TO Grunswald Hall somo two or three hundred
an1ious spectators, among whom was noticed
some Of the scientific heads Of the city. Since
thst tinse the iBventioa hes become sImost COM
mon in the Northern and Eastern cities, but not
until recently hsvs experiments been made hero.
The first was made month or two since by the
manager Of the
AMERICAN DISTRICT rgrnsnArH soNpAsy,
Mr.. W. Fl. Bofiugsr. who secured the instru-
msnts and connected TO them the wire leading
from the main Office in Exchange Alley TO the
Office on the corner of Jhekson and Magazine
streets, and during one morning tho invention,
was tested publicly and found to work admirably.
since then it has been q qut ston OF some doubt
/ In the minds OF some OF 0nr local electricians
| whether or NOT the telephone could be made to
work through cable, and yesterday the quss-
| ton WAS settled
BEYOND A. Do1nT,
and TO the satisfac ion of all those, Including
number OF electricians. who witnessed the expert
ment.
The District Telegraph Company secured for
the occasion the line and cable lacross the Mis-
sissippi) owned and used by the Crescent City Oil
Company, leading from their Office, No. 100 Com.
mon street, TO the oil works on the opposite side
length bong about four miles. To the end Of
the line on the opposite side OF tte river and in
the Office Of the mill was attached the telephone,
or half q dozen of them, and TO the line end on
this eide, in the Office OF the company, 100 Com
mon street. was attached as many more.
In the first-named Office there we're c0pgre4
gated Mr.. Geo. w. PackaFd, superintendent OF
construction of the American District Telegraph
Company; W. 8. Delant y, manager Of the Fourth
District Office, with friend, Mr. Charles Huck,
and Mr. Dartey, and In the LAST named Office
were collected several Of the gentlemen connected
with
THE cREseENT caTr or. COMPANY;
Mr.. W. II. Bohnger, OF the American District
/ ER9DbB>
tors severa practieai electricians, inc udng Mr.
Irvine, chic operator OF the Western Union Te1e-
graph Company; MIR. Hunt, assistant chief opsr-
ator Of the same company; Mr. Harry L. Smith,
Thomas o'oonnor OF the are department sod
superintendent Of FIRE alarm and police tele
graph, the Hon. jules Aldigs snd quite number
Of gentleman engaged In commsrciai pursuits.
!. That the DEMoenAr readers may more clearly
understand that which has heretofore beer
termeda
i BEAUTIFUL SCIENTIFIC TOY,
and that they can see with what ease IL can be
adopted % ready means OF communication, we
give before the account OF yesterdays Expert
ment an explanation Of the telephone Tor tele.
phones) used. IL consists OF three metal por.
tions contained in Q casing OF wood or light hard
> rubber, shout fve or six inches in length, and
nearly three inches in diaInster st the enlarged
! end, and an inch and quarter in diameter at the
small end, or that to which the main line ID At
, tached, aud In this casing, without battery ol
electricity, is generated the current by the voice
Of the speaker bimseR that communicates tbs
sounds to the other extremity OF the line. In tht
enlarged portion Of the casingi is
PERMANENT MAGNET
held by screw, and around one end of this mag
net is wound coil OF fine insulated copper wire
covered or wrapped closely with silk. the ends o
the wire being attached TO longer wires, extend
ing to and terminating at the smaller end In thu
, binding screws, to which 10 connected The mair
line, making, a. it were, "loop" or complete
circuit inside the telephone.
In front OF the pole and coil 10 soft iron disk
oil this being inclosed in the wooden or rubber
casing, having an aperture immediato toly n from
Of lhe disk, and which, beside serving as pro
tector to the magnet, acts as resonator. Tht
inflence Of the magnet, which 10 susceptible II
the slightest vibration, induces all aroundit ,
magnetic fluid, and
AN IRON DIAPHRAGM
is attracted towards the pole. Any alteration Ii
an alteration In the magnetic fluid, either b,
streng gthening or weakening it, and the slightes
alteration Of the magnetic fluid causes the induc
tion Of current Of electricity into the coil. tn
J strength OF this current is dependent upon th'
amplitude and rate Of the disk and these In turI
upon the air disturbance made by the veice II
speaking, as the telephone fthe larger end) h
held to or in close proximity to the mouth; there
} fore q wave Of air throws the diaphragm into vi
3 bration, and makes q change in the msgneti.
. full, and next an induced current is generated
} in the coil or magnet. Where two or more tele
phones are attached to the same line every vibra
! ton made by the first, or the one neares
: the ground wire-the end of the hne-i
repeated by the succeeding telephones, ant
+ Whatever sound produces the vibration in tn
first il transmitted and reproduced by the other
or others, If there be more than one, until it ha
d passed the entire length Of the raain line.
Thus it was yesterday, when some six or sevea
gentlemen, each with a telephone in his hand
and connected with the main line leading to an
J, THROUGH THE CABLE
to the oil works in Gretna, occupied seats st sh'
: Office No. 100 Common street. when the spokes
q J man at this end inquired Of Gretna it they Wer
q all ready.
''Yes," replied Gretna; 'tNhat will you have"
"How does this come TO your WAS the mex
question, and ''Do you get my Voice wel?'s
"You bel" was the response, "as clear as
bell"
ruaning conversation was then kept up b.
It the gentlemen on this side with those in Gretn
for two hours Or more, pending which time Mi
Delaney and Mr.. Dartsy, with another gentlema
in the Office at Gretna, sang quite number {
airs, Mr. Desaney playing IN accompaniment
IS each
UPON HIS BANJO,
and, strange as it may seem, each note upon th
instrument was heard with the voices of the tri
q II ,rho1 kho bsr