The Liverpool Standard and General Commercial Advertiser.
Liverpool, Merseyside, England, 1838-10-12 00:00:00

cold as an inferior metal. It is distinguished from the Eng-
lish glass as containing no lead, and but little alkali. In the
manufacture of different species of porcelain the chemical
union is not so decided as in &ass. it is not perfect. The
iinrortant constituent of the different kinds of earthenware
is clay ; . but this is mixed with a certain quantity of ground
flint, the object of which is to prevent the clay from shrink-
ing and cracking on exposure to heat. If we take a piece of
fine Cornish clay, we shall find that it is a compound of silica
and alumina, that it is the clay which in felspar is united
with the silicate of potash. If we take a piece of granite we
shail find that it consists of an aggregate of three minerals,
which are quartz, (pure silica) mica, and felspar. • Some of
these granites resist the action of the atmosphere for an inde-
finite length of time, but others decompose very. rapidly. Of
the three constituents of the granite, it is only the felspar
which is decomposed, and from' the action of the air and
water it is broken up. The silicate of potash is washed away;
and the silicate of alumina remains behind in the form of
clay. We can easily ascertain this by seeing the rock in
the process of decay. This pure clay is characterised by its
uniting with water and constituting a remarkably palpable
substance. If we take a portion of clay, and wash it with
water, it forms a sort of substance which we can form into
any shape we wish. But this pure clay it is impossible to
make use of at once in the manufacture of porcelain, be-
cause pure clay contracts very much in drying. The amount
of contraction is so considerable, that the celebrated Wedg-
wood, to whom the porcelain manufacture is much indebted,
made use of it in the construction of the pyrometer, an in-
strument used to measure the heat of furnaces. In order to
accomplish this, a piece of clay is dried at a slow red heat,
and fitted accurately into a gunge at the extremity of the py-
rometer. The piece of clay is introduced into the furnace, the
heat of which we wish to ascertain, and exposed for a twit
time to the high temperature within. The more• the clay
is heated the more it contracts. After a certain period it is
taken out and cooled, and it is again placed in the pyrome-
ter, and slid up the groove, the sides of which gradually ap-
proach each other, until it can be urged no further, when the
degree of temperature marked upon the side of the groove
where the clay remains stationary is that of the furnace.
This instrument is not scientifically accurate, but it is suffi-
ciently so for the purposes of the arts. If we take any of this
pure clay and mould it into the form of a vessel, the result
will be the shrinl:ing of the vessel in such a way as to injure
its form. Not only so. but it will crack in an indefinite
number of directions. In order then to avoid this, the clay
is mixed with silica. At the point where the clay touches
the silica, the latter melts so that the alumina is thus firmly
united with it. The vessel in this case will be smaller, but
it will not crack A remarkable fact connected with the
manufacture of glass is its great expansion by heat. It is
evident that the more at liberty a body is left to the action of
its own internal forces, the more permanent trill be the con-
dition it will assume, and if these forces be counteracted,
that they will be disturbed by the slightest application of ex-
terior power. Now let us suppose a piece of glass, when hot,
to be dropped into water, and its surface suddenly cooled, we
know that if a bulb of glass be slowly cooled, is very much
lessened in size; but when the
.red hot mass of glass is
dropped suddenly into water, the outer coat will be at once
solidified without becoming any smaller, the consequence af
which is, that the interior particles are held in a state of sus-
pension with regard to one another. It is natural, therefore,
that if the bulb of glass be subjected to the slightest vibration,
its internal structure will be disturbed. This gives rise to
toys well known, under the name of Itupert's drops, which
are made by allowing drops of red hot glass to fall into
water. When the point of one of these drops is broken, the
whole mass is resolved into a fine powder by the action of its
own internal forces. o violent is the action, that if the
point be broken off under water, the separation of the parti-
cles will break the glass in which it is contained, unless the
vessel be very strong. If we, however, heat one of these
bulbs to redness, and then allow it to cool slowly, no such
action will take place, because the particles Lave had time to
arrange themselves.
The lecture of to-morrow evening (Saturday) will embrace
the theories of Saccharine, Alcohonc, and Acetous fermen-
tation, &c.; and we should think thet it would prove highly
interesting to those ladies who pride themselves upon their
domestic housewifery.

STATIONS OF TH
ON TUE IST 01,
(From the United

E BRITISH ARMY
OCTOBER, 1838,
Service Journal.)

[Where two places are mentioned
the depot of the regi

E, the last named is that at which
iment is stationed.]

Ist Life Guards—Regent's Park
2d—Hyde Park
Royal Horse Guards—Windsor
Ist Drgn Gds—Canada; Covtry
2d—Newbridge
3d—Mancliester •
4th—lpswich
stll-1 ork
6th—Dorchester
7th—Edinburgh
let Dragoons—Cork
2d—Dublin
3d—Bengal
4th—Bombay
6th—Cahir
7th Ilusssrs—Canada ; Covtry.
Bth—Dundalk
9th Lancers—Leeds
10th Hussars—Hounslow
11th Light Dragoons—Cantrbry.
1 th Lancers—Brighton
13th Light Dragoons—Madras
14th—Birmingham -
15th Hussars—Glasgow
16th Lancers—Bengal
17th—Dublin
Grenadier Guards (Ist bait.) St.

40th Foot—Bombay; Chatham
41st—Madras ; Chatham
42d—Dublin
43d—Canada ; Dover
44th—Bengal ; Chatham
45th—Canterbury
46th—Gibraltar Devonport
47th—Malta ; Jersey
48th—Gibraltar; Cork
49th—Sengal ; Chatham
s,th—N. S. Wales ; Chatham
51st—V. D. Land: Chatham"
52dt—Gibraltar ; Newca,tle
53d—Ionian Isles; Naas
54th—Nladras ;,Chatham
55th—Madras; Chatham
56th—Jamaica ; Kiasule
57thi—Madras; Chatham
58th+—Ceylon ; Fethard
59tb—•-Malta; Mullingar
6jth (Ist hattn.)—lonian Isles
_ Dublin

(2d bat.—lon. Isles ;Portsmtli.
61st—Ceylon ; Clonmel
62d—Madras; Chatham
63d—Madras; Chatham
64th—Jamaica ; Londonderry
65th—America
66th—Canada; Youghal
67th—West Indies; Chatham
68th—Jamaica ; Waterford
69th—West Indies; Cork
70th—West Indies; Nenagh
71st—Canada; Cork
72d—C. G. Hope; Paisley
73d—Cauada ; Clare Castle
74th—West Indies; Aberdeen
75th—C. G. Hope ; Boyle
76th—West Indies; Drogheda
?7th—Malta; Galway
78th—Glasgow
79th—Dublin
80th—N. S. Wales; Chatham
BLit,C.;ibraltar ; Chester Castle
82d—Gibraltar ; Sheerness
836—Canada; Hull
84th—Portsmouth
85th—Canada ; Plymouth
86th—Stockport
87th—Mauritius; Castlebar
88th —Bolton
89th—West Indies ; Gosport
90th---('eylon ; Portsmouth
91st—St. Helena ; Dundee
92d —Malta ; Limerick
936—America ; Buttevant
94tha—Cork
93tha—Newry
95th—Dublin
97th—Birr
9th—Manchester
99th—Athlone
Rifle Brigade (Ist batt)—Tower
'26 batt.—Woolwich . .
Royal Staff Corps)—Hythe
Ist W. In Regt.—St. Lucia, &c.
26—N. Providence & Honduras
Ceylon Rifle Regiment—Ceylon
Cape Mounted Riflemen —Cape
of Gond Hope
Royal African Colonial Corps—
Sierra Leone

John's wood
(2d batt.)—Canada
(3d batt.)—St. George's Bar.
Coldstream Guards (Ist WWII.)
(2d batt )--Canada
Scotch Fusileer Guards (Ist batt.)

• Windsor
(2d hatt.)— Wellington Bar.
Ist Foot (Ist hatt.)—Edinhurgh
(2d batt. )—Canada ; Devonport
2d Foot—Bombay • Chatham
3d—Bengal ; Chatham
4th—Madras; Chatham
sth—lonian Isles ; Dublin
6th—Bombay ; Chatham
7th—Duhlin
Bth—Jamaica; Guernsey
9th —Bengal ; Chatham
10th—Templemore
11th—America; Chatham
12th—Mauritius •, Tr: lee
13th—Bengal; Chatham
14th—West Indies ; Brecon
15th—Canada ; Pty mouth
Pith—Bengal ; Chatham
17th—Bombay ' • Chatham'• '
11th—Ceylon ; Portsmouth
19th—Kilkenny
20th—Weedon
21st—V. Dieman's Ld; Chatham
22d—Relfast •
23d—America; Armagh
24th—ranada ; Gosport
25th—Limerick
Tiengal ; Chatham
of G. hope; Dover
Wales ; Chatham
29th—Plymouth
30th—ltermuda ; Sunderland
31st—Bengal ; Chatham
32d—Canada ; Fermoy
33(1—Gibraltar; Carlisle
34th—Canada ; Fermoy
35th-14,Tauritins; Stirling
37th—Jamaica : Cork
38th—Enniskillen
39th—Madras; Chatham

Royal Nesad. Veteran Comp:
Newfoundand

Royal Malta Fencibles—Malta

• Ordered for America.
:t Ordered for West Indies.

+ Ordered Home.
a Ordered for Ceylon.

NEEVOUS AFFECTIONS.,—An impression made on part of
the body will often produce a nervous affection elsewhere, at
a distance from the original seat of the disease, and where no
such obvious explanation of the fact presents itself. A dis-
ease in the liver produces a pain in the right shoulder; a
disease in the heart produces a pain in the back. The late
Dr: Wollaston was accustomed to relate the following:—He
ate some ice cream after dinner, which his stomach seemed
incapable of digesting. Some time afterwards, when he had
left the dinner table to go to the drawing-room, he found
himself lame from a violent pain in one ankle. Suddenlv,he
-became Fide; The ice cream tea ectiirri'o m the stomach,
and this was followed by au instantaneous relief of the pain
in the foot. —Lecture by Sir Benjamin Brodie.
HUNTING THE GIRAFFE.—The most approved manner in
the present day of hunting the giraffe in Narnaqua land is on
horseback. The natives watch the giraffes when they are re.
posing. and get as near to them as they can before they dash
forward; the gigantic beasts get up in their scrambling mari-
ner, and move,off as fast as they can; the horsemen pursue
them, and if their horses are good, they are not very long
neck begins gradually
in coming up with them, and they fire when the muzzle al-
most touches the shoulder of the giraffe. When the came-
leopard
twbrinnodffeei,ntleelaTmal falls on the ground.
Sometimes, however, an old giraffe will stop short in his flight,
allow the horseman to pass close to him, and, rearing up, will
overwhelm both horse and rider, and then make off =Sir
foals Alexander's Zrpedition of Pfrotery into A ripe.