The sun. [volume] (New York [N.Y.]) 1833-1916, 1878-06-28
EDIsONs xNvRNrI0Ns
MS Reply 10 what IL Said by Tive English
Professors ConcerninR Hin.

In reply TO despatch sent from London
by Prof. W. II. Preoce. in which he denied the
allegations made by Prof. Edison concerning
him and said that Prof Hughos's microscope 10
q very different instrument to Edison's tole-
phone, and that II was worked out without
communication with him. every word OF which
Prof Hughes approved Mr.. Edison furnished
yesterday what he says are proofs to refuto
thoir statements by their own words and by
extracts from the English scientific papers" He
quotes. In answer to Process words. Hughes
has not bought out any thermopie," an article
from tho Engineer OF May II, 1878. Hughes is
spoken Of in the article as the inventor OF n
thermople. Then Mr.. Edison quotes from
the Washington star OF April 10. 1878 an article
which shows that tho carbon telephone invented
by him may be usod as a heat measure and. to
provo that this article was In the possession OF
Preece before the alleged Invention by Hughes
tho Identical language ip the Sta In his lecture
delivered IN London on May 10. 1878.
Hughes by a letter from Ffroi. Langley Of tho
Allegheny Observatory. who tcsthes that as
i9ng as2 as 0et26Gr s7 Tsle he was on "a
measure. Mr. Edison then said to Prof. Lang
ley that the variation 81 resistance OF the car
! bon under pressure or traction from a snail
| heated adjacent body. light bo mado to control
tho energy Of battery OF any ssize and thus
D
As TO Preece's allegation that the mlcrophone
! Of Hughes 10 q, different Instrument from ths
telephone OF Edison, which claim is founded
| upon the fact that Mr. Hughes has discarded
be Use Si the daRnrogm TRd dEcSyerfa that
| quotes from the Journal Of ite Telegraph OF April
1G 1878. Of which paper, MI Preece Is sub;
that tho vibrating diaphragm IL done AWAY
with altogether In the latest form Of transmitter
which Mr. Edison has introducqd." That was
! writton over four months ago by Mr.. Ellison for
! PreseOtts book on the telephone and phono-
: Mr. Ellison quotes from n letter received from
Pruce says; II is .dlhlcult to distinguish be-
w Sss SS h df gibson and Suo EsN
number OF published documents 70 SHOW, HIS
| priority OF the discovery that carbon whom
| properly prepared. possesses the remarkable
property Qf changing its resistance with pres
moreover, correspond exactly with the pres
| sure This discovery was published In July.
| 1871. and In September 1877, Mr.. Edisons
method Il mnKnilying sound In IN ELECTRIC tel
| ephone was described at II meeting OF tho Brit
| ish AssocRtian al Plymouth in September last.
| Mr.. Prcece had Edison's telephone ip his pos
session at least month before the alleged dis
coyery by Hughes.
coadiutor Of Hughes is contradicted by Hughes
| himself in his lecture announcing his alleged
| discovery. in which no ,distincly SAYS. Ny
| thanks arc due to Mr.. W. II. Proece for
his kind counsel and aid In the preparation OF
| that Prof. HughOs, IN his communication 70 the
! French Academy VI Sciences adds to his piratcd
/ telephone the induction coil. although in Eng
land Mr. Hughes makes no mention Of this
| known as having been patented by Edison
| nearly yoar.