New-York tribune., 1876-07-29

lscuss,on OF wind, not az 8hecuhs 'ho ln'oH'' "
d Ipt as cudue TO accelerate or rctaId the velocity
of sound within given space.
FORMER INVESTIGATIONS
. rI,v,, enabled tie reader to appreciate the scien
,igc value o m Dcrlus paper, 50 iar as 1t feaeS ~
oil 70 the intensity .. sound proceed more lif.c"'''
toousder Tie historical place ass shtu 10 1t ny III ~
,, as also to bis own scientific ahors, Wh'h latter Nv
,srs were designed t. I'm ga abl'nk' alleged 10 nav
s,l fr,1 l7os 70 1873. For, after s'yins mat the
NJ Dr. Doram marks tie latest systematic INQUIRY
-, bind Prof T,udal Immediately adds that, "Joh'y
% tho 1lcr Brethren cf tie Trinity House. and aS lem
scientific advisor has u J.!gl - ~ IN he ne bi, Iere
a5,cae" The breadth Of ts element % anu Idct;d ,l l';
abors were well suited % eNGi'' some Z =, ~ ,au,.
Ia, ,f American r,gdcrs 10 was known 70 n"!!ls
iersons in the Uai'eo states lhu oh- p''G,e "D
r,p~ Of Dr. 1rUeaIs i,S.9'',,tyN; ~. -
,;stirg1ishcd Chairman OF III. luitu NttlcN iH-'l
house Board at N"si'n3vn, . & rIs,s y!c affect
- i,,fcuslty OF souni, With special reference 10 tnC
t3,oI STATES am0ng them the writer 0t thS com
.'t.,tiovi =. Who supposed taJt Prof IyucalI WHgh u
uu @ IN his eoUrtrv during Che Winter or l~'-, -" i,'
Wa> ~ %Io IN 0Do,rtrnity o obtaining definite iniolui-
-, -. . Ell "a. hut that on particular OyV'>i'ii Wy
geurs u, ,,u9iions and experiments at hat date had
i'' - mi Ia Dr. T,ulal'~ notice. rtitf I'D p't
read yn w ,-5 Efoe the Washington Philosophical
sority" convened at that Tine ~ sl' i i'' ,r,d'i
- Henry pelaced his paner ON that cc.'sioh Ntn %
S following ryeIcng to d. Iga3' ia .fse"ifS; sis cTc iy
tommSs,ftf forward at tins mc especially ou account
fine presence OF Dr. Ilnd3l ne mems m M TSt
a. I;, tbolI>e system of Great Britain, W.l' ll. ;
bav. In state ere connected win tAe u~hGTS, ,st IN
Nv 5isfin-lli,lcd visitor. Tue lactS NV ' ~.
or1o rart ol general report 10 be p"'S"-" ~ '''
h. : Lighthouse Board
co. br,1iy treating on the prevalence 81 logs 'i'h
The American coast Prof Hocry proceeded 70 CONSIDER
b,r sopt ae relations to fox signaling and IeHa'A'u
as follows: ,,i
In stud,-n, this subject It becomes question ci IN,
noTtance TO ascertain NEcifcrW1N q" su,l' ,'f,t
of eit are absorbed or sthea y io4, on on ', l tiI
however Observers disagree; Al n.st - my i, ,..rs,fS
very striking analogy WHch ,AiTS ,A, has iotley prc.
between light and sound, tue o!li.oh "a, a.. ' ,r,,
ya1,d thIt sound is impcIed b' l'T. j. ~ ~ .H., & s-e
have not been iunnenc,d ~ ms 2HaI'l III s,I g is bS
{Usfg,cty a5oJicd me opposite ot".at "t' - q ..,ta
r. 1c4,7 dtr,ng t,g Hen m ccor re9tt' la 10 S,r E,
this question definitely the iah.n'"v 1 me- rome
rom Bosten 70 ST. Johns, the lo2-sjs"alS eulll
Dc sounded @ e'fIy tsse q n6rts pa pass the station
b,h in clear and fOEEy weather the pilots on 'n'lu
iuto' ssh i,aI m distance Of the boat waen the sound is
rrst heard on approaching the signal ana Is iaS' eIH
mate thcs distance with oonsid.raoe precision oy llt
number of revolutions Of the patile-Whcc as i'tu'T
means 10 definitely decide the point IN question. We
think il highly probable that fog does s1ht NM @ C
uro3uce an eject analogous L. the PROPAGATION q" li.ul
But when We consider the extreme hhhhtcAt,a =. l.o
particles OF water constituting The rog as compared WIN
fhc magnitude OF the waves OF sound thc g'""4 H',,
not hold eIcept IA 50 s'noH degree as 10 Ge y no E &
6vi t.e Hi1kQn insufficient cause Gf dtrut"'" %, S0,
hch ceC IS 59rne Cd Dy ne g,ea. Gs""S, n,Srr I"
which without doubt Is tue one .n., lAt ] 1u'.-
d,n.fy Of the atmosphere. heat and moisture, III
long distances The effect Of this however "cud 'l-
"rty he IN slightly stort the wave OF sound rather
i6.a Ia obitere IT, Iooe5er tbs mag BE- zee 0"o, fo'
al ne O5serrs oaS zee hace mate. Wt sglc IS :1,"t ~
o. WIND. During residence Of several weeks al 'l.
sri-shore. the sound Oi tue brtdk T. az ",''', ~ ID
about mile in no case appeared TO he crnclitH, W
the variations OF an aueroid bIomci or
but in every instance i vas ian Affected 9} lle 81 @
tAe wind The variation IN the d,t'ucthls> %! ,It ,
Of a distant instrument depending on the ihecu'" 'i
ma he Uyiac;gqI cqps. Of the jHcGc,cHcy IL eciia,
cases Of the most pOlCertW Jog-SigHd'S'
In the remainder Of his paper, as read in the resencH
OF Prof Tynda, the Chairman OF the Lighthouse B1irI
APPLIED the hypothesis Of Prof stokes 70 an explanation
OF certain abnormal phenomena Of sOund which lad been
observed during the course OF his systematic inquiries
with regard to the causes which aAoct the intensity ol
sound-advertiug incidentally TO the lateral dlvelSeEc
Of sound as an element Of the problem which had re-
ceycd careful attention al the hands Of the Lighthouse
Board. In a word the paper Of Prof Henry contained
the report Of a systematic inquiry into these causes III
stead Of being ike the chapter OF Dcihau report Of
conflicting aud ncoucusye observations bound together
b. no tie whatsoever OF scientific conference Ana 5et
after listening uch elaborate d,squs.uon on the
abnormal phenomena Of sound and their interpretation,
Dr. Tynda makes distinct statement Is late as the
year lS75 that the paper Of l7O5 marked TIE last ~
temdtc investigation Of its kind pri"r TO his o8n-a sun
ulcrt rendered only the more inexplcable by the fact
that paper of Prof Henry avowedy brought ioI-
ward because OF his presence in Washing 1n, and
because Of his supposed interest in such scieatc us
cussion. For Dr. TyndaPs allegation, it will be or
served is made as one Of historical fact and Ec repeats
the statement IN stiI more emphatic form, when,
in the next sentence he avcs that there had been "a
bau" in these scientific discussions siacc tine year l1os
"A blank which ho "designed 10 l' with the results o
his investigations as begun the 10Th Of May, 1873,
five months after lie paper Of Henry had been
read In his hearing and had been made the subject Of
discussion in which he had participated.
DIR. TYSDALL5 EXPERIENCE IN AMERICA.
The inaccuracy of Dr. Tyndalls statement under this
head is not saved from structure by the plea which la
subsequently uteposed 10 the effect that the paper Of
Prot Henry had not been published when the summary
Of existing knowledge inserted in the last edition
OF the work on Sound In communication 10 the
editor Of The Nation. under date Of Nov 49, 1870 DR..
TyndaI writes:
Prior to the South Foreland investigation, where,
would ask Is systematic inquiry INTO these "a
BE- IouIdt surrey, IL s1oh an MUIR 4 rs ] Xxx
j you prove its existence, sou win have night :"
demand from me the very fullest apology aud rcp3iata
for stating thaJ mo slcL systematic inquiry D1G " nay
knowledge been made.'
The fact that Prof Henry had 1dc systematic invest-
CATIONS on this subject was published" 20 Dr. Tyndal
and to the Washington Philosophical, soiety" when
Henry read his paper before the latter IN presence
the former, tne 1th of1Jg-uICr, 1872, Just the
fact that Dr. Tyndal had made similar researches
publlshed" 70 his auditors he read his "
them before the Royal Society the 10Th Of January
1874 and before the Royal Institution the 10Th Of Jan
sry 1874 The same papcrcf Prof Henry read the
llth ,of December. 1872 with the exception Of it-
predatory slusOu TO Dr. Tynddl, was read before the
"Eational Academy Of Sciences" az Ncw-Yorl on tho
2sth Of October 1875 and, with the addition Of sen
tence or two, was printed in fail ia TIE NLT-YoEB
TRIBUNE the following day. Tie paper, therefore
certainly published" in the fullest sense OF the
term, the 29th Of october, 1873 seyora! months
laofe NJ Dr Tvr1yll'4 rae.qrai,fs l.J la.u