The Sun.
London, England, 1842-07-25 00:00:00

Heats, one mile and a distance.

Mr. Meiklam's Wee Willie, aged. ( Timpleman) 1. 1
Mr. Hutchinsou's Maria Monk, 5 yrs
W'on by a neck.
GOODWOOD RACES.

The following are the names of the horses arrived, or on their
road to Goodw.,on :—All Fours, Knight of the Whistle, Mar-
shal Sault, Mehemet Ali, Dilbar, Y. Petuaria filly, Peter the
Hermit, Attila, Armitage, Elopement, Meteor, The Ladye of
Silverkeld Well, The Castor, Envoy, Mowed, colt out of Miss
Craven's dam, Tyrolian, Dr. Caius, Pharold, Aristides,
Johnny, Welfare, Gunter, c by Elis, out of Partiality,
Vulcan, Tupsley. Retrie-er, Robert de Gorham. f by Actreon,
out of Corumba, Fireaway, Rover, bro. to Plenipo, oh g by
Plenipo, out of Bangtail, Aspatria, c by Velocipede, out ot
Guerdon, Snowdrop, Arida filly, Trampoline filly, 1 ,ark Susan,
Hydaspes, Rory O'More, Ningrelia, Pickwick, Fitzroy, Har-
rier, Defier, Hasidic, .larmercus, Una, Auckland, Candahar,
Sleight-of-hand, Evening Star, Van Amburgh, l'us, Tri-
dent, Little Wonder, Clementine, Hopeful, Mary, Knights-
bridge, the Golden Rule, Policy, Lucy Banks, Vibration,
Paul Potter, c by Augustus, Gientiry, Pocohont.:l,
Belgrade, Daddy Longlegs, Curry omke, r rcanus, Mid-
dlehant, Charles 12th, Ainagill, Studley, Royal Prium,
Vakeel, Cecil, Came;eori, Cornuto, Remnant indsor, Ni-
cholas, Helpmate Glance, Discord, Passion, Thi Vi
stle, Whipper,
c by Sultan out of Victoria, c by Bay Midaleton out of Mar-
gelina, Warden, Waheb, Wiseacre, Mr. John Day's St. Lau-
rence, Jack-in-the-Green, Sultana, The Squire, Man Friday,
Arctic, Messes, Garry Owen, seahorse, Murat, The Tiger,
Sis. to Ferneley, Delusion, Eosphorus, A bydos. Celia, c by
Beiram dam by Emilius, The Corsair, 13olissima, &c. &c
Handicap for the Chesterfield Cup—Hyllus, 6 yrs, lOst—
Sleight. of Hand, 6 yrs, 9st 101b—Little Wonder, ti yrs,
9st 91b—Van Amburgh, 4 yrs, Bst 121b—Dr. Caius. 5 yrs,
Bst 121b—Mus, aged, Bst 101b—Priam, 6 yrs, Bst 71b—Bellona,
aged, Bst 71b—Garry Owen, 5 yrs, Sst 41b—Fitzroy, 5 yrs, eat
41b—Johnny, 5 yrs, Bst 21b—Belgrade, 4 yrs Sat Olb—R e-
tr iev er, 6 yrs, 7st '
b—Zelmira. 5 yrs, 7st 91b (paid I—Mark
Beck, 5 yrs, 7st 91b—Prince Caradoc, 4 yrs. 7st 91b—M.
Soult, 4 yrs, 7st 91b—Rory O'More, 6 yrs, 7st 91b—Mustapha,
4 yrs. 7st 21b—Envoy, 3 yrs, 7st 21b—Pharold, 3 yrs, 7st 21b--
Thu. 4 yrs, 7st Zia—Policy. 3 yrs, 7st 21b—Adela (filly ) :3 yrs,
6st 141b—Celia, 3 yrs, Est 131b—Lucy Banks, 3 yrs, 6st 131 h-
- aged, 6st 121b—Baleine (filly) 3 yrs, Est 101b—Cle•
mentina, 4 yrs, Est 12Ib—Cerito., 4 yrs, 6st 101b—Vakeel,
3 yrs, Est 101b—Seahorse, 3 yrs, Est 101b—Elopement, 3 yrs,
6st 81b— Rover,3 yrs, 6st 71b—St. Jean D' Acre, 3 yrs, Est Olb
—Saros. 3 yrs, sst 101b—Norma, 3 yrs, sst 71b—Rhodanthe,
5 yrs (paid)
LATEST BETTING AT ST. JAMES'S.

THE Goonwoon xts.-5 to 1 agst Knight of the
Whistle (t); 9 to 1 agst Helpmate (t); 9 to 1 agst St. Law-
rence; 11 to 1 apt Welfare (t); 14 to 1 agst Tupsley ; and
14 to 1 agst The Corsair (t),
TH Goonwoon CUP.-4 to 1 agst the Squire (t); 9to
1 apt Marshal Souk (t) ; 9 to 1 ag-t Charles the Twelfth (I);
12 to 1 agst Middleham ( t); 12 to 1 agst St. Lawrenc, (t);
13 to 1 agst Belcccur t); 13 to 1 agst Fireaway (t); 15 to
1 agst Policy (t) ; 200 even on Marshal Soult agst Charles
the Twelfth (t); 15 to I agst. Charles the Twelfth winning
this and his match.

The grand assemblage of troops that was to have
taken place at the beginning of September, under the title of
the Camp d'operations de la Marne, is stated by the Moniteur
Parisien to be countermanded, but the Camps of Luneville,
Saint Omer, and Chalons, will be continued separately.

The draperies which are to adorn the catafalque
on which the body of the Prince Royal is to be placed in the
Cathedral of Notre Dame, and those to cover the car in which
it it, to be borne in the recession, will be upwards of twelve
yards wide.
The l'oulonnais states from Algiers, July 10, that
in the night of the Bth, Ben t•alem fell upon a tribe which had
made its submission to the French, and cut off the heads of the
men,-• and conveyed the women and children to the mountains.
This account, however, does not.d.ppear to come ATM An authen-
tic source.

ROYAL POLYTECHN'C

TUTION.

Iu re
A monlst the many inventions of m,:, s,z.enius,
are few, perhaps, which claim more cLm rvediy the tviAm-
don of the public generally, from the extreint; simplicity
of its manipulation and its general utility, than that
branch of the photographic art culled " calor) pe." This
branch, which was dis .vexed by Mr. Fox Talbot, in Lng-
mud, synchronous with the daguerreotype prOce,s, in-
vented by the French chemists Messrs. Niepse and
l)aguerre, in France, differs only from the latter in this,
that the calotype delineates upon paper made sensitive,
whilst the daguerreotype delineates upon metal rendered
sensitive. _

We attended a lecture upon this subject, delivered by
Dr. Ryan, at the Polytechnic Institution, a few day
ago, and, as the calotype process is at once simple and
interesting. we make no apology f presenting. our
readers with a brief outline of the learned Doctor's
lecture.

The lecturer commenced by directing the attention
of his audience, first, to the chemical action of light
upon the colours of plants and anitirds, contrasting
especially the dingy whiteness of the animals and birds
of the polar regions, with the gay and luxuriant
plumage of the " minions of. the south ; ' and, secondly,
to the action of the sun's rays upon certain chemical
compounds. He then proceeded to trace the history of
the art of " pencilling by means 'of light," from its tirst
dtwn among the alchynnsts, through its various grads
tions—enumenting the experiments of Wedgewood and
of Davy, resultingmfailure,from their inability to fix the
picture—the more successful attempts of M. Niepse and
M. Daguerre—and finally, the discoveries of our coun-
tryman Fox Talbot.

After contrasting the calotype with the other photo-
graphic processes, and esp..cially pointing. out its appli-
cation to the arts and sciences, and its use to the
botanist, the meteorologist, the traveller, and the anti-
quarian. Dr. Ryan proceeded to prepare the " se-Nnsitive
paper," which vas dune in the following manner. having
chosen good post paper, of an even texture, he brushed
one side of it carefully over with a solution consisting of
100 grains of crystallized nitrate of silver in six ounces
of distilea water. The paper was then carefully dried
between blotting paper. It was next dipped into a solu-
tion of 500 grains of iodide of potassium in one pint of
distilled water. Upon taking it out it was washed well
/in distilled water, and again dried. In this state it is
called "iodized paper," and may be kept any length of
time, as it is not yet very sensitive. To prepare it for the
reception of images, the " iodized paper" must be brushed
over in the dark, with a mixture of the following solu-
tions, A and B :—Solution A consists of .100 grains of
nitrate of silver, dissolved in two ounces of distilled
water, to which is added one sixth its volume of
pure arctic acid. SOlutiun B is a saturated
solution of oxalic acid in distilled water. Equal
volumes of the two mixtures are put into a 14-iass,
and 'applied by means of a brush to the paper, which is
afterwards washed with distilled water and drie,t. In
this state it is ready to receive.. impres-ions obj, cts,
and is so sensitive, that if held to the light it inane-
diately becomes black. After exposing it to t e action
..: light, with the image either reflected upon it, or placed
in contact with it, for a few seconds, it is removed, and

it examined will present no trace w hatcver. It is now
again brushed over in the dark wilh the mixed solutions
L 1 and B, and then placed upon a tin vess: I containing
Imt water, when the picture begin, to develope itself.
When it is sufficiently (let eloped— s it will be in the

ciiurse of a few seconds—the further action of light is
arrested by brushing he paper with a solution of 100
grains of bromide of potassium in eight ounces oi dis-
tilled water, and afterwards washing and drying.
In conclusion, Dr Ryan point, d out the difference
between " negative" and " positive" pictures, and stated,
that, although the first'taken in a camera was la:gal:ye,
having its lights and shadows reversed,yet by placing tb
picture so taken in contact with ,-ensitive paper pre-
pared by
i the old " photogeni'l" method, or, as recom-
mended n the calotxpe process, and expo,ing it to light,
a positive copy could readily be obtained fr m the, nega
tree
We cannot conclude, without remarking on the very
manner in which .tlielioctor mad, his lecture coin-
prehensible to the meanest intellect. Avoiding all fami-
liarity, he was free with his audience ; his object ap-
peared to be to make himself understood by every one.
The process is a very beautiful one, and by it the most
delicate 'tracery of artificial productions,- and the most
i,xquisite shades, and lights, and tissues of natural ob-
jects can be copied with unrivalled' accuracy.
The INorks of the calotype process may, in fact, he
termed natural copies, and they are so far superior to
those produced by .he pencil and the brush that a mag-
nifying power applied to them, instead of exposing de-
fects and blemishes, serves only to heighten their beau-
ties, and to detect new and more charming resemblances
of the original.