Daily Kennebec journal. [microfilm reel] (Augusta, Me.) 1870-1975, 1892-11-19
81 TELEGRAPH.
Axp.p coll,s,oss AZ SEA
lsye.sisssiaa 4 Ne Msihiiib d UAsas- ~
aad creen Lights

-, - r.
WAsHfsSroS, NOV : y "I..,,,s.,.t-
ternationAI Marine 'sshssie"s, !. ,,.,~an.
ed system OF lights on vessels = -.
tive of COLLISIONS q, sea uieis -. .,,5
essary the exanhhaftoh u ~. :, ~,
intensity 81 ksats Ano 'ne n.,,s -. !.
problem vnat a. siie 'e~s 1..,a 10
which lights OF Sa0as C....,n
clearly SEEN 4. ashaas - .ss,s nm
rules were iaia uo- = - a,snlsv cer.
der way AND nj shsao' 49, TIC
tam pfea.iah -. wbst visibility
nauet " ,S,.,.,,.,~a hosrd az
meant was sei' 70 u's ro,nm;,,ea
'i.s ueas's =. s,,l...,ad 10 eopluct expe-
81 eApef'' "sis
'iii,ens o,,a, ~ SIGNALING on ships
aai .'-..n, 1, i fonna that there
- va ~. .,.,,,.rt NJ which the light
s sl.oes1 - i.,.,.r,, shopId he measured,
-, Es,;,ct Tn 10 the time
s - 80, ,I.r;na Conference set
=, =. -, 10 ,,i,,.. al n system of
s.sa ~ ~ .bars no. b.ap mo official deter
slsna 80 .,,a ,,owey and intensity of
n ,,ln r., ~. arnar,s ,,ad an uutrayersei
ign - - -, -,
The experiments which were to deter
hat tNQ htasr
-, ,,,a,.;,a .s .nehor and running lights
uer. contacted AT the Long Beach Bar
I ;g,,, station. New York, Three lanterns,
ttteI viii, red. white aud green lights, re-
snactiy.Iy wen. placed on shore, and OBJ
ssrva,ion,i were made of them from dis
,snces az one. two. three. four and five
n,,les from the land. Each lantern va:
nroviaed with device which permitted ths
variation af candle power from one to 43
TN, ,xnerimspts were considered satisfac.
,ary e,,.ep, that the ,iah, from the light
h.nsa intt-fere,i sotnesFhat with the result
In ,baso exneriments the white light wa.
,nast satisfactory.
~, ,be FIRST nights observation The
,ra,ibar w,s clear anil yery favorable fol-
see;n,, li,,hts Al one mile the red light Al
~ Ill, ,,,,,,.r was not visible. while tn,
white light at | candle power WAS eleasl,
visible Az the same distance the red liz
,I-I- c,ud,o noyver and the green light =
se candle power were still visible; tn,
-ad i;,h, Mt > was barely visible: til,
green l,rlt nj . 10 was very faint: the rec
I;yb, ,r32O was fairly visible; the greer
ligbt At 4 ~ was brighter, but not suffi
,.;entlv d;stinct.
Al Two miles the red light at 8 80 candl,
ro,,ar conld moi he seen, and was barrel,
y;sible when the candle power was in
oraasad a, that distance IN 5.75. At tw.
miles the green light. at 4 candle power
was Invisible and could be indistinctl,
saan ,yba, The candle mower was increased
70 IN n The red and green lights. a
INK at two miles distance. were visible
hr, M, distinct in color and when the can
wara no, fnllv distinct At two miles, witt
a candle mower of % the red and greer
tights wore distinct. while the white light, a
| . indie uownr fro,, The same point o
observation. was clearly distinct.
| Al fonr miles the red light at "a canal
mower. the green light at y, and the whit
| jipbt at 10 were easily Distinguished
througb glasses but invisible To the make,
eve
Al f;va miles ihe white Iinht Mt % candl
mower w,s family visible at 33 clearl
| risihIe and at AZ distinct
| IN tho socond NIGHTS observation tn
weather was eloudy. with A few patche
only of clear skv. and no moonlight. A
ono Mill tho rod ligbt ut AZ candle move,
was indistinctlv visible. while the gree
l;yht raouirea > 10 candle mower to becom
faintlv visible. and the white light require
only "a candle mower to be seen satisfac
tori,v At two miles the red light wa
hardly disrcrnable at i IL candle power an
the or,pn Gybt indistinctly visible at 10 81
and IL 10 was the least mower for a clea
color The red light was distinct enough 9
Two miles at a candle powcr of %. 90, IL,
white LIGHT at three miles was distinct $
=. 20 At F, miles at 3 60 candle power. q
! FIVE miles at II 80 candle power.
| The ex,erts fouud that the problem O
determining the least candle power at whic
eolored lights conld be seen at definite di.
tapaes il rot canable of A rigorous solution
| In the first Mace. the eyesigbt of differen
observers varies. and the light of A certai
camille nower womb he clearly visible
one while it would be indistinct to another
and might he invisible to a third. Their
too the nature of the atmosphere. dry O
bumid. dusty or clean. would have a COZ
siderable INFLUENCE on the range of VISIBLE,
of the lights. although the night of observ;
ton was apparently clear. In the case @
co)orel lights. red or green. the amount c
absorntion would increase with the densit
of the color of the glass, and this woul
also cause much variation in the range ,
visibility with lights of the same candl
noxer behind it
!