The Sun.
London, England, 1840-03-07 00:00:00

BELL CRANK AND KEY WAREHOUSE,
No. 71, QUEEN-STREET, CHEAPSIDE, LONDON.
UA MES A RTH OR MILES respectfully
informs the Trade that he has OPENED the above
PREMISES, with a complete STOCK of the newest Pat-
terns in every department of BELL-WORK. The entire
suits of Cranks have been remodelled, with the latest improve-
ments, under tho euperin'endence of experienced workmen.
To general Ironmongers, this stock it is hoped will prove a
desideratum. The certainty of obtaining whatever their cus-
tomers may want, the advantage of having only what they re-
quire, and the equitable terms upon which these will be sup-
plied, will preclude the necessity of keeping a stock of many
articles which are not frequently called for. The Cranks are
arranged under different suits, each suit from one to six flies. A
large stock of bell-levers of the best makers. Range-cocks,
ventilators, bells, copper-wire, &c. &c., upon the lowest terms.
Boxes of wards, keys, and blanks, of every variety.
All kinds of Smiths' Tools and Bell-hangers' Implements, of
the boat quality.

SIGHT AND HEARING.
THE INVISIBLE OPERATIVE VOICE
CONDUCTOR, effected by the Messrs. S. and B.
,DLONIONS, OPTICIANS and AURISTS to the ROYAL FA-
MILY, 39, ALBEMARLE-STREET, PICCADILLY, by which
thousands of deaf persons have been greatly benefited, is the size of a
geven-shilling piece, and when fixed into the cavity of the ear is soft
and easy, and not more perceptible than having a piece of wool in its
Place, by which the faintest whisper at a public assembly is heard
with distinctness. And defective VISION is brought to nature by
the use of newly-invented SPECTACLE LENSES: immediately
they are placed') efore weak and imperfect eyesight, either by day
or candle light, every object becomes clear and distinct, and the most
Minute parhcle is seen with great distinctness, by the use of which
both the sight and hearing become much improved.
The Messrs. S. and B. SOLOMONS disclaim all connection with per.
sOita of the same name, and the Sale of Amber Spectacles : the per-
nicious use of Amber Spectacles being now well known to the public,
and the Vendor being aware of it, he has therefore altered their
flame, by leaving out the word " Amber," and calling them " Pa-
tent Spectacles " those which he terms " Patent Spectacles " are no
other than those of Amber, the history and destructive use of that
material for Spectacles to imperfect vision is fully and most satisfac-
torily explained by the undermentioned scientific authori. s:—
From the " Dictionary of Arts and Sciences" of Andrew Ure, M.D.,
F.R.S., &c. &c.
" Amber is an indurated vegetable juice, and not produced by the
laws of crystallization, but by the same causes which influence the
mechanical condition of gum. Insects are often found embedded in
it. Amber is most powerfully electrical by friction—very hot, to
such an extent as to explode into fragments ; the workmen, too, are
subject to nervous tremours in their wrists, arms, &c. ; they en-
counter great danger by handling such dreadful excited- clectrics;
Amber grows with lime, and is apt to take fire, and is of such a
soft nature when exposed to warmth that it swells, bubbles up, and
will burn away with flame."
The above Dr. Use's statements are further confirmed by Sir D.
BREWSTER and Pliny, as also by Parks and Heny on Chemistry.
The destructive effects of such a material for Spectacles, to imperfect
vision, may be ascertained at any respectable Optician's in London.
The Messrs. Solomons' newly-invented Spectacle Lenses are not
constructed of such a material ; but which are very superior, and
bring back at once dimness of sight and imperfect vision to its
original and natural state ; these Spectacles, and very small Voice
Conductors for Doaf persons, arc only to be bad at their Establish.
snort, all, Albernarle.street.

. .
From Dr. F. H. RAMSBOTHAM.
•' I have examined the Messrs. S. and B. Solomon's Newly.inventrd
Spectacle Lenses, and I very much approve of them.
(Signed) "F. H. RAMSBOTHAM, M.D., New Broad.street."