The Sun.
London, England, 1869-08-26 00:00:00

GAS FOR LIGHTHOUSES.

Professor Tyndall has just reported to the 13°'",:‘,.-e
ht-
rrade on the proposal to substitute gas for oil irk "v
houses. Having read the reports and papers stlifinittitl
fo
by the Commissioners of Irish Lights, he visiteu re'
establishments referred to, and, by a series of p 0 gees'
meats and observations conducted during several to
-e days and nights, established the facts and cawelig o
the conclusions which are embodied in his interesti
and valuable report. With the desire of chechiegge,
observations, he availed himself of the services of oe of
Valentin,
the principal assistant in the Boyal
Chemistry. The first step was to compare experin3entaed
the illuminating power of the gas light nosy ewPil.
at Ifowth Daily with that of the most powerfinf'or
lamp in use for the same purpose. This lamp 1135„trie
concentric wicks, which give rise to four cellee-ljeit
cylinders of flame, the interior flames radiating
libbt
light through the exterior cnes. A greater body of
is thus sent forth than could possibly be obtained frOdorig
single wick. Such a four-wick lamp was placed in °6 feet
room, and by means of a Bunsen's photometer, 3 At
e"
long, was compared with the gaslight now
eopleY ad
H owth Baily. The burner of this light, devise C
rr
constructed by Mr. Wigham, consists of a series —0;e0
centric rings, furnished with fishtail jets.
of 2S jets iS
rings from the centre comprise a group
this is the light which, in ordinary circuinstencm-
burned at Ifowth Baily. But to the central "r 0 each
be added in succession four other circles of burners' ea
comprising 20 jets. Thus, the lowest light erePige,l 131,
emitted by 28 jets, the next in power by 48, the t''"pts 01.
68, the fourth by 88, and the last by 108 co of
gas. It is possible, therefore, to employ lit;;,le et
The first
lid
five different powers ; and the superiority of
over the oil flame was very strikinglY 51180 „q
graduated experiments. The 28-jet burner Pess-ri r 44
times, the 48-jet burner 41 times, the 68-jetburDer
times, the 88-jet burner N times, and the
10S Jet'
13 times the illuminating power of the four-wiek to the
Professor Tyndall's visit, on a summer evening,
eloyq:
lighthouse in Dublin Pay, was unexpected. If: bt i
t t
" The 28-jet burner was in action, and he ljga
emitted appeared to be a very fine oe. I eAnsocers
rD
keeper to pass to the 48-jet and the 16b-let bn.1.011138
succession. The ease with which he did so cony° if eot
that complete practical mastery over the apParettif9a'r, th
already attained, is certainly attainable."
Professor's observation had been limited to t'loveiegi
i 5
house. But, he says, the atmosphere itself throng` the betA
the light has to pass to assist the mariner 0)0
every giesfeije
photometer. He therefore arranged with CaPt3inyetietl9
and Mr. Wigham a programme of distant
and it will readily be believed that obserecotien
was taken to give the oil-lamp fair pi:lY." it r. /'.16
28-jet gas-burner was afterwards made to bur:ct'g ,chit 4
when observed from Poolbeg, a very brilliant ligh,
obese
says Professor Tyndall, "it was impossible
t 0 fit• O
of the two lights was test. Captain Roberts
ham, and myself were unanimous on this re "ft!
in 7,,
subsequent trials were magnificently interesting'
°f eeen
9.50 an oiled calico screen was placed in fr°ll:ov t,4
. 11
light ; the gas flame had slightly the adventstgu"pereior!"
oil in penetrative power. The same feeble 15dry
was manifested when an additional screen 01
and a sheet of muffled glass were added to th!
t'bureen
10 p.m. we passed from the 28-jet to the 68:J13,00°1ft
The decided superiority of the:gas flame was in 3
of lig"' I°3
apparent ;it exhibited a very brilliant globe _
added'
10.10 the 6th and 7th rings of the burner wer,u,
jets being now employed; the light
the oil-flame, which, when burning alone, 511°73e nf the I
appeared to shrink and pale before the WO "
was trulY4Liotils:

jet burner."
The Rev.
Rneevw. preaching Thomas
is announeedo,m, " sensation" has 10 101°
neared.
dated frovner:
described as years of age, and only an loch
than Tom Thum2t.
to a she:
cl odubia.l
ye
n,
ut hmeb
of "youthfulservEi c
esnag:leis:o,llo7lcl
' ate,
The Derby 3/
J. R. Selwynl Buxton, and received frele tbe piety
to
tclhoectnoerrtvhtesisnkkas
(his lordship's sc n) :—" I inn glad to 13° 1030
state that the Bishop is slowly improving in health, t
_a io
ho is still sleeps
br
ebessectrtieber thet : faconolrolboy:i
0:11:10:::::0,
able to awivedleiliavkoi
horlfimoaP,bout two hours every 'lei; et, of,
rse very much out of order."
oshifeoOniianrlsvilesrV.ammieidrua.nesd ay, at the Norwich Elotion frt
COT /1111°.
Beverley,tive interest.rlVdyTi'l The £lOO
o ct.ihelre,oosotladwt eaLdsi
bcgthatirva elan:
gtaehnset:c
xi ericoe on
0:1:
:eri.0::!:
Samuel Bignold, who was returned in the L'el' ° At
ry parliamentaryte
odns
ahlelolmthdeo
not take a bribeWinacetedtlnlee A,eo 0 . 1
ho voted for Keane, the Liberal candidate, att' r, :ft, 00'1
1854 e,
io:neteeionfosrfottriethCoolsieberv:atii:l: 016:
1859 he voted for the Conservative, and got £2. —, ice
election
being
toldhe received 155., and voted for the Consort
pt be
Nv Ile:methat they were in "for the double event."
Wednesday,
election.
e eiu. freeman
Ar; atnibeecilasPt:ce:3:l:o,
it a confirmed this man's statements.
___

-_----.....------
ew gunvessel Favourite, A <Of
The screw
in
spaid off at Portsmouth yesterday WO P
n the third-class steam reserve. WO
The troopship Simoom, Capt• Lethbridge,
dot
removed from the Warrior dock- at rortsa)foti
yesterday, after having had her bottom cleanc" fore
newly coated with anti-fouling composition, lie
preparing for further troop service. rlett'
Captain Lo- liteca
TuLiesdaity-.G
G.Cel3 .
.9 having returned from leave of ahse 00
eneral the Hon. Sir James l'orke Sea
ace,
resumed command at the Aldershott Divisio3
Commander E. H. !Murray i e AP'
pointed to her Majesty's ship Virago, vice Billg"
superseded. Cat'
The armour-plated screw-ship Warrior, ,iii.,
11. Boys, arrived at Spithead yesterday frora !r,ii,
mouth, exchanging salutes with the Duke of 11 `e
lington, flagship of Vice-Admiral Sir J. 1111:0
K.C.B. Capt. Boys leaves the IVarrior to joini
1,0
was vice
iii,
Excellent gunnery ship at Portsmouth, and I'4l
succeeded by Capt. Stirling.