366 
matic of the art of weaving, reclining 
with pensive aspect on a remnant of 
brocade, lamenting the neglected state 
of this manufacture. Enterprise 18 
represented raising her up'and cheering 
her drooping spirits, by shewing hera 
cornucopie, pouring forth its treasure; 
a symbol of the resources of Britain, and 
indicating that the ‘wealth and liberality 
of ‘this nation are ever ready ‘to support 
Jaudable undertakings. Close to Enter- 
prise, and beneath a representation of 
the all-seeing eye of Divine Providence, 
Genius appears erect, pointing to a flag 
displaying the weavers’ arms, placed 
upon the temple of Fame. The corners 
of the flag will be adorned with emblems 
of peace, industry, and commerce; and 
an edging with a curious Egyptian bor- 
der, wil exhibit a combination of figures 
and devices, indicative of the desizn for 
which it was formed. : 
Mr. Luxe Howarp, of Plaistow, has 
detected a criminal imposition, the 
knowledge of which cannot be too widely 
circulated, or its effects too carefully 
guarded against. A very large quantity 
of glass of lead, has, by some means, 
found its way into the London market, 
as glass of antimony. ‘I his imposition is 
sure to be discovered in the operation to 
which the latter is chiefly applied, the 
making of emetic tartar; but it is highly 
necessary for the consumers of smaller 
quantities, as in the vitrum ceratum, and 
vinum entimonii, to be acquainted with 
the following distinctive characters of 
the two; that those who have bouglit the 
article within the last twelve or eighteen 
months, may assure themselves of its 
being genuine. The public health, and 
éven the lives of many patients, may be 
considered at stake on this occasion. 
Glass of antimony has a rich browtr or 
reddish colour, with the usual trans- 
parency of coloured glasses.. The glass 
of lead is of a deeper and duller colour 
against the light, is much less trans- 
parent, and even in seme samples quite 
opaque. The specific gravity of the 
true, never exceeds 4°95; that of the 
spurious, is 6°95: or mm round numbers 
‘their comparative weights are as 5 to 7. 
Let twenty grains be rubbed fine in a 
glass mortar, adding haif an ounce of 
good muriatic acid. The true dissolves 
with an hepatic smell; the solution is 
turbid, but has no sediment. The spu- 
rious turns the acid yellow, giving out an 
oxymuriatic odour, and leaves miuch se- 
diment. Leta little of each solution be 
Literary and Philosophical Intelligence. 
[May.1, 
Separately dropped into water. The 
true deposits oxyde of antimony, in a 
copious white coagulum ; or, if the water 
has been previously tinged with sulphuret 
of ainmonia, in a fine orange precipitate. 
The spurious gives no precipitate Tey 
water ; and in the other liquid, one of 
dark brown or olive colour. A solution 
of the spurious in vinegar has a sweet 
taste, together with the other properties 
of acetate of lead. A very small mix- 
ture of it may be detected, by its de- 
basing, more or legs, the bright orange 
colour of the precipitate thrown down 
by sulphuret of ammonia, from the solu- 
tion in any acid. ‘The samples of the 
spurious hitherto detected, are of 2 
much thicker and clumsier cast than the 
genuire; but the appearance is hot ta 
be trusted ; and no specimen should be 
aliowed to pass without a trial, either of 
the specific gravity, or chettii¢al pro- 
perties. 
A medicinal spring has’ lately beet 
discovered in the park of sir Witirax 
Paxton, at Middleton Hall, near Llan= 
arthey, in Carmarthenshire. The water 
of this spring, whose effect aflords juss 
ground of hope that it will occupy a Gis- 
tinguished place among the British foun- 
_tams of health, has fleen analysed by 
Mr. Accum, who found the gaseous 
contents in 100 parts to be: : 
Cub. Inch. 
Carbonic acid gas - 46°50 
Atmospheric air = 4°50 
QL: 
The solid contents in 100 parts are: 
Grainte 
Carbonate of iron 5°25 
Muriate of soda ° 6°00 
~ Carbonate of lime - 4°73 
Muriate oflime ~~ = 3°25 
Sulphate of lime. - 2:00" 
Ba ge ds 
Mir. Ge Culvbekt Hes: having found 
the wear of steel! files rather expeusive, 
has been indaced to seek a substitate 
for abrading hard bodies, and has disco- 
vered that clay may be‘employed for this _ 
Wet pieces of this substance, 
folded up in muslin, cambric, or Irish | 
linen, forced by the pressure of the hand 
purpose. 
into the interstices of the threads so as 
to receive a correct mould, and then well 
baked, form a new species of file, capa- — 4 
ble even of destroying steel, and very 
useful in cutting glass, polishing and 
jvory, and all sorts of 
rasping wood, 
metals. 
A pound 
