The Sun.
London, England, 1848-12-12 00:00:00

SCIENTIFIC OPINION.

Laboratory, Royal Polytechnic Institution,
October 21,1848.
Str,—After a careful examination of your New Gas Burners,
which I have tested in comparison with the best hitherto known. I
am compelled to acknowledge that your recent di<covery is superior
to all others in economy, and in the purity of the flame produced
by it.
By the simple, yet truly scientific arrangements of your but ners,
you have succeeded perfectly in obtaining the proper supply of air,
both in quantity and position ; thus, the flame is, at all times, steady
; and intensely luminous; while even under suddenly increased pres-
sure, or during draughts of air, no smoke is given off.
I remain, Sir, yours faithfully,
9 JOHN RYAN, M.D. LL.D:,
ip Professor of Chemistry.
;0 Mr. Richard Clark, Strand.

The whole of the burners are constantly burnine at the Establish-
ment of the METROPOLITAN LIGHT COMPANY, RICHARD
CLARK, Resident Manager, 447, West Strand, corner of Adelaide-
street.

LEA and PERRINS' WORCESTERSHIRE
SAUCE is universally allowed to •be the roost Piquant and
the Richest in Flavour of any Sauce in use, and for Fish, Gravies
for Roast Meat, Steaks, Game, &c., or a zest for Curries, Soup, Cold
Meat, it is entirely unrivalled.

The unparelleled success of this Sauce having induced imitatlous,
purchasers are particularly requested to see that the name of LEA
and PERRINS are upon the Label and the Metallic Capsules, as also
to read the Testimonials (which are enclosed with every bottle)
from the residence of Royalty, the principal Club Houses and Ho-
tels in London, Edinburgh, &c. &e., and from private Families in
the country.

Sold by the proprietors, Lea and Perrins, 6, Vere-street, Oxford-
street, London, and 68, Broad-street, Worcester; Messrs. Barclay
and Sons, Messrs. Crosse and Blackwell, and other Oilmen, London,
and generally by all dealers in sauces.

ON NERVOUS DEBILITY AND GENERATIVE DISEASES.
Just published, the Thirty-sixth Thousand, an improved edition, re-
vised and corrected, 120 pages, price 2s. in a sealed envelope, or
forwarded by the Author, post paid, to any address, secure from
observation, for 25. 6d., in postage stamps, illustrated with nu-
merous Anatomical Coloured Engravings.

ANHOOD: the CAUSES of its PREMA-
k DECLINE, with Plain Directions for its PERFECT
v _a.
RESTORATIO'.
A Medical Essay on those Diseases of the Generative Organs,
emanating from Solitary and Sedentary Habits, indiscriminate Ex-
cesses, the Effects of Climate and Infection, &c., addressed to the
sufferer in Youth, Manhood, and Old Age; with Practical Remarks
on Marriage, the Treatment and Mire of Nervous and Mental De-
bility, Impotency, Syphilis, and other Urine-Genital Diseases, by
which even the most shattered constitution may be restored, add
reach the full period of life allotted to Man. The whole illustrated
with numerous Anatomical Engravings on Steel, in colour, explain-
ing the various functions, secretions, and structures of the repro-
ductive Organs in health and disease ; with instructions for private
correspondence, cases, &c.

By J. L. CURTIS, Surgeon,
7 , Frith-street, Soho-square, London.

" ' Manhood.' A iledical Work.—To the gay and thoughtless we
trust this little work will serve as a beacon to warn them of the
danger attendant upon the too rash indulgence of their pa islons,
whilst to some it may serve as a monitor in the hour of tetnpta-
tion, and to the afflicted as a sure guidute health."—Chronicle
" Manhood.' By J. L. Curtis.—Their long experience and re-
putation in the treatment of these painful diseases is the patient's
guarantee, and well deserves for the work its immense cirulation."
—Era.

" Curtis on Manhood' should be In the hands of youth and old
age. It is a medical publication, ably written, and developes the
treatment of a class of painful maladies which has too long been
the prey of the illiterate and the designing."— United Service
Gazette.

The Parent, who beholds his beloved child pining away, and fast
approaching to a premature grave, in consequence of some disease,
which, for want of careful investigation of its real cause, has been
set down to the score of consumption, will, on perusing this work,
ke astonished to find, that in nine-tenths of the cases of young per-
sons of both sexes, who perish of what is called pulmonary con-
sumption, heart disease, takes, &c., the sole and exclusive origin has
been the indulgence in certain destructive habits practised by youth
mach more frequently than it is at all suspected.
N.B. Hours of consultation from Eleven till Two, sad Six to
flbot

OVE is the leading feeling of the human
JU breast. More exalted than mere passion, it soars high above
every other impulse of nature, and is not only stronger than avarice,
but more engrossing even than ambition. No mania exempt from
its influence, or can avoid its sway ; and business, pleasure, philo-
sophy, and divinity itself become neglected under the enthralling
power of LOVE, which, unlike most things, increases in intensity
with time, until it receives the sacred consummation of marriage.
When union does not take place, however, this passion.. this
fervour, this golden tide of the manliest feelings becomes a deadly
poison in the heart, which now darkens, as it before bright-
ened, all things upon earth. How is it that men, of most un-
changeable habits, will change at the very altar, and after a life-
time spent in the fulfilment, of every engagement, snap the very con-
tract asunder which should be most binding to an honourable mind?
It is the effect of conscience. The Lover, by enervation of early
habits, or the results of secret disease, knows himself to be
disqualified, and dares not enter a state which has been
instituted by Divine Law for the fulfilment of important
ends. The wretched condition of such a being must subsequently be
beyond measure deplorable ! Loving and beloved, he entails the
most miserable disappointments on the object of his choice, and npon
himself a desolation the most horrible, when the simple possession of
natural attributes would change the scene, and yield to both a life of
unalloyed happiness. The subject is interesting, and deserves the
attention of all. Those desirous of investigating it will find the
fullest and most satisfactory information in the little work er.titled
SELF-PRESERVATION,
illustrated by forty coloured engravings on the anatomy, physiology,
and diseases of the reproductive organs ; with practical observe-
ions on the secret infirmities of youth and maturity, resulting from
solitary habits, excesses, o:• infection.

By SAMUEL LA'MERT,
Doctor of Medicine, Matriculated Member of the University of
Edinburgh, Licentiate of .Apothecaries' Hall, London, Honorary
Member of the London Hospital Medical Society, &c.
This treatise is the result of a long course of study in a peculiar and
much neglected branch of medical practice, and the author having ob-
tained the highest medical honours, is a guarantee for his profes-
sional experience, which has reference almost solely to the treat-
ment of these diseases.

REVIEW OF TIIE WORK.
La'Sfert on the Infirmities of Youth and Maturity.—" There are
scenes in the drama of life which are acted with no spectator but
Conscieuee ; and of these the result is ever disastrous. Happy the
mortal who meets with a timely mentor to snatch him from the gulf
into which such scenes must plunge him 1 In the book before us
such a monitor is to he found, calculated to• warn and isstruct the
erring, without impairing one idea that can vitiate a mint not al-
ready tutored by the vices of which it treats. It is written in a style
of masterly precision and lucidity, blending the profoundest truths of
philosophy and physics with the loftiest precepts of morality. It is a
production calculated to confer a vital benefit, physically and morally,
upon all who are tempted from the rigid path of abstemiousness and
propriety. A father may trust it in the hands of his boy. By un
taught innocence the book is not, of course, needed ; but wherever
laxity has prevailed, the tender yet awful voice breathing in these
pages Is likely to prove as strikingly beneficial as the admonitions of
a homily blended with the practical advice of a writer on medicine."
—United Kingdom Magazine.

The work may be had price 2s. 6d., of Kent and Richards, 52,
Paternoster-row; Hannay, 63, Oxford-street; Starie, Tichborne-
street, Haymarket; Gordon, 146, Leadenhall-street ; Mansell, 115,
Fleet-street; or, free by post, for forty-two stamps, from the author's
residence, who may be consulted on these disorders personally, or
oy letter, daily, from Ten to Two, or ft•oni Five ltEigbt.
37, BEDFORD-SQUARE. LONDON.