New-York tribune., 1879-09-01
crayon for demonstrations and illustration OF u'a'
TELEsCOPES-HE

| "A
| ton on Chemistry withdrew TO separate apart
1 r,ent ard tbe second paper before Section was
mad nv Professor William Hardness, Of tho Cnited
: statcs Navy on "1he Color Correction OF Acnro-
matte TeIescopesr The subject was treated IN n
pnrely technical manner and by constant use OF 'ne
Dr. i,ouis Elsbera. of New-York. though not on
| tL. programme of the day for the department ni
Anil,ropolofy. was called upon To- dsci's lhc suv
| icct of hereditary transmission j he essay "hich
| he read vas listened TO with mar;ef IN
| terest by the crowded audience when mn mn
assembled in the Trle IT. rSspa rHSm stated With With
| the conceded fsct that physical and also ncnlai
aud moral traits frequently hcreiiiarlIy 'rahs
| have been advanced to explain this phenomenon
He held that according to the hypohesis OF resen
eraion ancestors are mentally and physically born
! again IN progeny.
Mr.. EDIsON's LATEST INVENTION.
PROV EssoR BARgEE rXrrAINs THE CONSTRUCTION
| or IHE TELEPHONE TO DELIGHTED AUDI
rxcE-Mg. EDISON MAKES DIAGRtMs-IIIs ELFC-
1Eo-cuHMICAL TELEPHONE Described II DE-
TAIL
| rrroy RPaCIAL CORRESPONDENCE OF THE TTiDuSEl
| S,g4roGA. Aug 30.-In ;hc evening there was
! an exhibition Of Edisou's elecir0-chenical tcle-
| paone. his latest invention. which Lc perfected
! about three weeks ago. aud of which be IS now
making 500 nj Monlo Park. The Jowu Hall was
crowded with people, who were all greatly int"r-
c,tcd and amused. On tine platform we're Professor
| Barker pr, sldcnt of the asociation. Mr LdIson
! Professor A. Graham Bell, OF Washington. inYolior
of the nagnet0-l eephOae, and Professor Bolton
general secretary of the association. Ffesideh'
| Barker i'm clear simple aud popular w@V, gave
istnry OF the telephone and IN account o. the ina 2
,eto ;roaspitter and receiver. the carbon trans
miter of Edison and all The improvements Oh
! ;he original invention. The distinctions be-
/ IF
! known up to the time Of Edison's most recent
| nvc,f;on. which were expl1ined by President
| Barker are familiar 10 the readers of iuf lMBUNf,
bavinr been pre- eDted repeatedly and iuliy III It's
| collmus. Sir. hL.son aniIbiy aci9d A GF@ugA-h-
man illustrating The cr1fictsfistc5 OF thf FdTln,
! n.chinrs By diSS;Gn.s 90 TIE bacA Dodid, WHi,h
! 1Ide,l President Barker in his explanations -
i,.n he oOmpGr,tivs PO~tT and dt...I'l"s
J OF Ihr vaTieds foiins OF tiansnittcrs a1L r.
ceivers weTo tested lOr the cni'gLteninent of lhe
audience Mr. Bschc!dui, MI tdisOhs ahsisiihl'
LILO !, blessed with most powerful anJ resoNant
voice but Was afi cted Tonight with c'i N tue
! he ! was ia a distant ToDH IN the building 10
! Wien the telephone wires were cCniuctrd IN Tue
| frst place experiments were tried with the
| magnetic ;ransDttcr and magnetic receiver. ana II
was sh .yvn that oaIy yerson, aad ne cniN "neh
| holding The receiver to ms ear. couii near iir'
! J}achelncr's vOciicrOus remarks ANA ihuiGc'-
| o,Is Songs. cyon though thai worthy ge"tlenal
strained MS lungs 70 fhe utmost. lhrn 'ha caIhpn
the magnet receiver were us@d, ana
! n few persOns ciase TO the Instrument Coulu near
family Mr BarheldcIs shouts iutO the tT3usnIter.
| TIC sounds were InucI louder tAan when tne mag
neto trsnsi,ter was nsc but corld not be heard at
| al a. a hrilc distance from the receiver.
| Fin?llv the cectrO-cbemical telephone was
| used with brilliant success. Mr.; bacnehhoi
| talk recitaions and singing could DE ho.1iu
all oye5 the BAH and tai aTISff naycIscs a
| Mar Had Little Lamb Jack ami jill went
! M ths I'M % " John Browns Body" " There WAS
Little Girl and the axe he aechD!l "'s ss-i'"
nue iun unc,io., however. No selections from fIna-
| foro we're given The telephone gave distinctly
tie singing of two aud three persons at
1 ,,lE f md
9mse Of f"s enotasr fS at at H tbs same tine % whstns
ans on the cornot the c.ckic Of hens and ne crow
in, of cocks laughter load and lonz repetition "t
the alphabet and wllstlng tosefner' ana many
other sounds. -,
Mr. Ed,son described tie machine which worked
Le.e wonders, and drew plan ot II Oh tEe blatk-
ina,t IA, sald however. that lie WAS nor snre Le
could maze II quIte clear to his hearers Tor
he did not understand ~ operation en-
iirsly Lin.self From a Diaphragm extends
an ann az right angie. tcnrhng cylinder oi eilaik
mo;slcnca with a soinl 81 rhospate ot -"ua IN
der ly lit;le block Ot rubber which Is pressed upon
the arm hy as,r,w ohclod by the inRer of the re-
eeiycr of e message who keeps tue cyilnuer III fo-
fatoa BY little crank. he working or TIC instr-
mIent depends upon tho pinclple thdt VI"
massage of current Of electricity through
4 moisened substance prcpnfed IN the
way the chalk cylinder ! prepared prevents nc
ton. Hence when the O. '''ri' waves come from
the ran-fnlttIr .nt :e it '-i ' "ii5's t" f'"
sage of wave, ana u 81 % AIl'I'"n aioH'o
the arm protecting frum H., .ia n agM, ana the
diaphragm itself vbraes with an intensity greater
Trom the tgsnsmiier Ienco the cnfecblng Of the
current By the length of wlTe that II
u4,ses over il made up and the voice
Of the speaker singer at the transntter is heard
nearly ~ loudly, or sometimes even more loudly ~
tho receiving instrument than at the tf'nsnitteT
Tue ourrcJt. however does not pass directly from
the wire leading from the tfasmtter % Inc electIo-
chemical apparatus Owing 70 some defects IN tel
cgrauh lines Mr. Edison says that 1t u necessary 10
bovn two coil, very BnOrt distance apart. The
current from the transnitLcr reaches tDe nrst coi
"d wave is sci in motion ia the second coil which
goes to tho chalk cylinder
TIE SOUND MAY BE INCREASED.
The inventor said that he could il Necessary
strnct Instruments which would make tho sound
hre. or four times as loud any man could possibly
shout Three or four yealT ago he had somewhat
similar instrument at Saratoga, but mostened paper
WAS then used ana not prepared chalk, and the in
| s.rnwent was imperfect. Ii would not transmit
spoken words but would transmit music, and con
| cert WAS given in New-York. and the music heard
ON the piazza Of the Grand Union Hotel by the use
| OF that instrument 81,
! telephone has no trumpet at ire end ike the
| magnetic receiver. The apparatus - IN small box,
| with crank at the side ana glass front through
which the screw passes by when tine receiver
| presses on the arm extending from tho diaphragm
! to ths chalk cyliader. There is a little round
! hoe Mt the top OF the box The inventor
| .oow,d that il made no difference III which
| direction the cylinder was turned nor whether III
| Wa, turned fast slow But II lie stopped turning
| tLe crank the sound stopped tho same Instant The
| recaiycr mas thus entire control over the message
| M enInd is heard until he bcgi ns 10 turn tho
| crank and ths message only continues while the
| revolution OF the cylinder is Kept up;
| Mr. Edison's explanation pleased the people
| greatly. HIS quaint and h0mely manner, his un-
polished bat clear language. his odd bnt Pthy OK
prcssions stirred aud attracted them. MI. Ldlson
| Is certainly not graceful or eloquent. JIG Snuined
| about tho platform in an ungainiy way. and
bis STOPPING, swinging hguro was iacElng
| IN dicut w But his eyes were wonderfully
| expressIvc his face frank and cordial, and his fire.
0nent smile hearty aud irresistible II his sentences
were not rounded they went 10 the point. anu the