, 1875-06-27
P0lAR;ZED LIGHT.
Tbs Host Curious and Remarkah,. .,
AL Optical Phenomena. -
Some Preliminary. Exp}auak,o,
OF the Accepted Theory
Of Light. 1850

| SVAJ
! of Light. ~~s
:
:
v+.etr,, tbr IL. c6t....r = =
m. rrss+;,,, il ,,ot rst.s.a :.
- ~ ~ oo4teqoeatty aakad Nj
| 10 1ofat'zeo AEasf 10 comprehend IN intsif;:
bic snsvar 10 this question, acaaxs, ,5.f
gtvon, tho reader must first nnda,.t.na s2t'
5in.- 1;.h+ :. .,1 h,v..a - "aas q
s.-.e.;L,. ~ ~ "na' meaas L i
t4@ao ooeeop'to'e :" 'ae understanding, +,
aesnng with subject 30 complex "a th,t =.
light and its phenomena and tho ele,n.n+, -, " =
| combine L, nroduoa it. and i, v;a- -. :, "alea
th,t ,on,a ~ thasa " 10 faet
~ oea3es especially Ii.
e.n7f' ase OF character aooVs mud be5ohd l.
direct grasp OF our senses, except dnfv IN 4
world Of imagination, or, az Prof, Tynd.1, hA:.
tho snbsensible world,-it IT, pe1ban. - s.a
th.t =. raso,f ~ II. a-o...~ pe.oepa' better
"osaa'-thoSe "lta "n1eo 10 a1e better md ma.
Intimately acquxinted.-and BY analogy sra,o ~.
intellect to proper and correct updE,t,,A-'
Of those things which ara not di,ec.ly scn;saa9e
are Of the subsensibla world In tha e..s satsa
will lake "'s q
SOUND.
To PRODUCE tho senaaaoa Of sonna i:
things arc necessary: First q sonorons ~ ~ II
trating substance capable OF inpsrtns y = \.
I
! oudly. \ medium OF conveyAuca a. ~ sse
EuoBphere and lastly the auxicr1fay 49,. ~
| drum Of the ear ~ it is usually c,rsn''
| either Of these three ele1nentu m ~sn.;nu y
there can be no auot, thing ~ sound. for IN.
lago blacksmith NAV eu1ite his anvil v1th ~ n"
force Of Hercules, Of tho church sa1ton - -
| his bell till doomsday, II there b no ,n.Asss
Of communication By which the vh,,t;oD. tao.ea ::
| tho anvil or the bell can be conyeyed to H.. - y
or if there be the proper medium of oomnna;
cation, but no ear to receive tha uhrstcr- ~
pulses and convey them to tho brsin t,sn ,ka ~
can be no sound. It ia mistxka n '.nnsss. Soes
| that when the clapper OF bali ia .t-orip ipse* ~
IentlY against its r1!n that thn-a r1:;at n.cs ~
| be sound. for this is by no meana ioo1.s' ~
duction from the rK.misea. hi, Ssst .Taa ~
vacuum would produce 20 sound. ~ -
Now, We havs cited thesa Rrossor m,,,,,.&
with which va ara more fanai1,s, .hs nrsaa.
of drawing f~PA
| ApARA,1rr :.
th.t shall assist the 1magiusticn -, r,6.,....
ing somothiuc Of rha natnre of 49, a1..esas
whose combined action produces in "a tha .ssa.
tion which we call hight. 10 eeeiue. than a.
bearing three condifions or ele,nsn:. 49, ~ ~.
sary. first- the Iurninonr nhiart IN 4.
combnst1on- vhich. fika tha haii h.. .;sar@
or treuuions motion secondly. the s{h.e =.
medium Of communication; and :astly. shs ont.
nerve which receives the imract ~ the s,h.s Shss
waves aud thereby convavs u ~ - a1les ~
sensation Of light or seeing. -
THIS ErHER ~
is 4 substance OF which se haTa n; 7Sssa1saHS
coxnizance otherwise than by ia a0Acts rs
in this manner, With suitable instrumental e.
pliances, We msy demonstrate it's prsssnos ID.
hundred different wsys. and 40 n,.in1s -
admit Of no question ~ to its resGt1' MI
substance Of fnfinitesimal density aun sn;a,,naars
elasticity, md, although it's elsstieaty d an sTt
that cubic miles Of it, and perhaps hunafaak =
them, might be contained in ona's h,e 1aa (
ton and makeup OF the universe It Il If IA ;ss
importance to III than that Of the sun itsa]f n,
without its agency neither light nor hAat 6s1
reach us from that tar-oH lu1pinsrT.
The late Sir David Brewster. Who ~. tn III
day OF his death . Disciple Of Newton; md hsN
to the emission. theory Of light as adYucated b,
him, once remarked that he coald moi bah7s
the Almighty guilty Of so clumsy c1str rftss,;os
a. that of fliiar soace With ethar aa n 1,adfrm
Of communication for light, to which Tyndsn
replies that be considers this vexY t1iaafa,ou
ground, and g,enihcant,y holds thsi I'm drsr,a,
Of science and Hir David ou 1his noint = sitS
many other persons On othar pdina d Ha
they profess to know too nnch snont ~ ~ i.
Of the Almighty.
Any intla1nnnable substance in thu ri of ann-
bust1on imparts i tremnlons n,otion b liz sur.
rouDfj;1p athar in = 1n.n1sr nh d;sa;vh-Sohs,
by which
4 vAy. ,eoT1oy r.
il in,n.rte3 n ,.tar hr t,,a ,;,r,,,ir.n* ~
BILE into It, and this fr1c.lon IL taken up bT tn
ether a. that Of the pebble ia by tho wstef mi
sent of in every direction from tho luminous
point through space like spherical shell ous-
ward. travelling at the enormous velocity, IN round
numbers. OF 190, 600 m11ee in 4 second Of TINA
This ether pervades every known substanrs, u
sir. wateE, glass, the hardest metals, md ssta
The diamond,-the latter being peculiarly sdspt
I'D to It, which is the chief cause OF it's brians1.
10 short, there is no substance OF winch Ne hays
my kno ow1edRe in which it does pot mix freely b
lud with its atomic aud molecular constructed
LIGHT,
IT, more phiIosophica1ly speaking, ths eshr
raves "a one Of the elements Of Light s3ssn
noves in d direct or right line unless refract4
I DETECTED from irs course by some oths. sat.
tance or CanBe. Again, il He imagine r3y ct
lght starting from point in space. rsttatinE IN
irect lines, we must also imagine tho ethsf
'aves which have been set in motion by th&
Ct OF combustion, "a Nbratng 10 aud fro n e
~ direction acroes these imaginary lines dt d.
actions Of tha ray, and that at esoh vibration
aey are propelled forward in tho direction taa&
10 ray Is travelling.
NEAsrRENErr or wAv1.
The distance gained in each vibration <cro0
ae ine Of propagation or, in other uorda, tha
latance from sinus to sinus. OF from crest 10
teral distance OF distance from stde to sds
hlch each pndn1ation mikes il cAllsd 1ss aaQat
,he