The Dorset County Express and Agricultural Gazette.
Dorchester, Dorset, England, 1865-06-13 00:00:00

COrTfollolllltllCe.
IMAGE, RAIN BOW, AND ATMOSPHERIC
spEcrtte. —No. 111.
To the Editors.

"The production of halos," says Rir David
Brewster in his "Treatise on Optics," "may be
illustrated experimentally by crystallising
various salts upon plates of glass, and looking
through the plates at the sun or a candle. When
the crystals are granular and properly formed,
they will produce the finest effects. A few drops
of a saturated solution of alum, for example,
spread over a plate of glass so as to crystallise
quickly, will cover it with an imperfect crust,
consisting of at octahedral crystals, scarcely
visible to the eye. When the observer with his
eye placed close beside the smooth side of the
glass plate, looks through it, at a luminous bodyy
he will perceive three fine halos at different dis-
tanoea encircling the source of light. The interior
halo, which is the whitest of the three, is formed
by the refraction of the rays through a pair of
faces in the crystals that are least inclined to
each other. The second halo, which is blue
without and red within with all the prismatic
colours, is formed by a pair of more inclined faces;
and the third halo, which is large and brilliantly
coloured, from the increased refraction and dis-
persion is formed by the most inclined faces. As
each crystal of alum has three pair of each of
these included prisms, and as these refracting
faces will have every possible direction to the
horizon, it is easy to understand bow the halos
are completed and equally luminous throughout.
When the crystals have the property of double
refraction, and when their axis is perpendicular
to the plates, more beautiful combinations will
be produced."
With such

I are

. combination.
nature in the cold icy sky above us, we need 'They were both Sr and respeatablity,
not the veracity of a narrative which ,ind the impression made on their minds was sever
e old "Guide to the Lakes of
bearing as it does not only all No longer Aft we teetrioted to elLeillie:
of eraiaemblance., but susceptible "Cmn no things he,
And overcome es 'its a anntwer aloud.
, explanittons now applicable to Without our special wonder?"
clam of nnenaine,tai.
Soutra Fell," says the Guide, which there
for We are well persuaded that optical philosophy
" is i by arecting its attention to these spectres of the
reason to thint zthis production of one of the mist, could trace and measure their transmission'
highest names in .our literature, "linearly nine to us oratory riantingh to determine. he terms..
hundred yards high, barricaded on the north and 'W. wALLAceinfra
west.edes with precipitous rocks, but somewhat
more open on the east, end easier of access."
E
Jn this Mountain occurred the extraordinary METROPOLIS SEWAGE AND SSEX
phenomenon that towards the middle of the last RECLAMATION BILL.
century excited so much - consternation and -
alarm-I mean the appearances of armed men This bill was read a third time hi the House
and other figures. the causes of which have never of Lords on Thursday evening, and is now,
in the smelled degree received a satisfactory therefore, an Act of Parliament for all practical
solution; tboulih• from the circumstances here- PurPoses-
after mentioned, there seems reason to believe As our readers will remember, we have
that they are not entirely inexplicable : - steadily advocated for four years the scheme for
"On • summer evening of 1743, as I 'avid Eeriest, utilising the enrage of the north side of the
servant to J. Wren, of it ittoa Hail, the oats, metropolis, now finally *clop :ed by Parliament,
..ev ,to liisketilla eel attars at the door with his which has bees more thoroughly examined sod
matterytheY !law, the figure. *DM With a dog pas •14,fteg ma practical business-like mamas by the
suing some tiorantelosig the ar t
„Bom. Ifell-e place I •:= ,-...,
t,ip
Tenon* parliamentary committees who have sot
.0 tto•P Unfit 1111 bP". "4 4; .66.1 `PPe" " Igro 't thanprobably anal any ogous measure.run i.t an amasses pace till,thesi pions of sight 11‘,.; s I
the lower end of the FelL' , .'. - . . Amordingly, when the third reading of the bill
"The nett morning strialiet sad Ms twister aimended was opPoeed by Lord Deem= and Lord
the steep side of the monatelbrafell.etpseration that Hardwicke, who sang the old mug of "Walt •
they should Bart the OM! deed, as theiy were little longer," it was almost the unanimous
persuaded that: tin swiftness wti,eh he ran mint
have killed him. They expected to lad likewise several feeling or the Bono that the echemeesttilifieg an
demi tones sad a nuimber of bente-thees among the the requirements of the Mee, and that delay
rooks witieb-ehey were sure the horses could not bat could only be mischievoniclour peers alone
"throw" is ' galloping et such • furious rate. They being found to vote spinet the third reading.
were, however, .dersinted, for there appeared not We may, therefore, .00ngratulabp the metro
the lesMweetigeef et*l,er man or hone-not so mach u
...
the mark 11 a- horse's bad on 'the tart or amongst the P°l.." ralle-PameM uPcet the Blienticul with
small Moms en the'steep. Astoniihment, and a doom. which Paths as considered their interests,
of fear.wediaph. fair eteeti time indutfrd them to cone..l itnedserne 'income which they *ill
the circinbatilsioss ) bidet heath they disclosed re from thia undertaking, with
and, as might well be spl iospd, were only laughea .. whi metropolitan improvements may
for their ortylulite,_ , ••• ' '„, '
be , and last, but not least, we con.
"the fallowing maitiltices fed June, as the same
iivid Strisket. *hest the tints lived with Mr. William Undulate them upon the happy MOB thatin
caster's lather. at Blekehills, was 'talking • little suppirt of the third reading of this bill, so
e the house, about seven in the evenieg, be saw a important to them his Royal Highness the
II el I""temen. riding °I The sil
'" of B°°*rs Fat 1" Prince of Wales reairded his first vote ever given
y clime redo mod at a pretty brisk parte. Mindful w
ritticale hbvit bed been ezeited 11fRiftitt hint t i
he n the House of Lords. - • -
le year. be centinurd to observe them in silence The fast of .biis royal highness taking pert in a
aim; but being st but aouvineed that tie ip-,dJvisiop f r .tbe first time Upon a question of
aemanes.tesarrat, he vaunted tea house and let riniql at nitlieli( indeed, a subjeut of congrstala-
Ign, Lonoster tbat,be bad something curious to shots' roi, ' Al, is it shows that the teaching and
- wmt
out
tw °Lbw' Y.- s"iok."-1 ..4,41...( his illustrious fAtlies have not been
or pointed it, 'Auk his mastor's uji .
•oservasommettlie ahrairepera 'Dad when con. host upot hisa, hat thati.he is fullowicg the sante
that ahe Wee eePaelleillb elieelliabie to both, I course which eommoted that adult, of the Priem
informed the Mealy, se thatabe phenomena were I Cosisort with so many of the strides of modern
English Civilisation, and caused him to be eo
Time oitiosur Alltrlllettiototed to w
tea me from the
7 Mat o"ilea aria eita. teems visible at the uerrersallF aed stamrerellY h'ettetted" -Th..
ogled Koott. They mowed ia mii
otor iron,,. kwg present it . one of them solleams for benefiting
ride ef the Fell till Mee twee (mooed. to Bleke. I the masses, by a self-supporting industrnd
whop Ow wend cm, the itountatn. Thus that I eaterpri4 , Acli trattld_bars Pined the
4/eking' el earribieestaath. and both their first I
g
OP by*een ...ai.l4 ef., 41 ' the .Prinee ,00asort ; Old
POPrilige IiPI ligiied. tlyel.the am, , . . .
:inftw-ptutikising sessio be Re
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