The Sun.
London, England, 1861-11-21 00:00:00

EXTRAORDINARY OPTICAL DISCOVERY.
Extract from the "Medical Circular," Nov. 16, 1859 :
"We have observed with much pleasure an important dis-
covery in the grinding of spectacle lenses by Mr. Bernard
Davis, optician. They are superior to any others ; and from
their peculiar transparency can be easily adapted to any
sight, avoiding* all strain to the vision. We have no doubt
that the most imperfect eyes may be surprisingly assisted by
this novel discovery."
Country residents suited with the greatest accuracy by
stating age. List of Prices :—Fine steel frames, with real
Brazil pebbles, 7s. 6d. ; ditt ), very finest frames, 10s. 6d. ;
ditto, with best glasses, 3s. 6d., 4s. 6d., ss. 6d. ; patent panto-
seopic, for the clergy or public speakers, to look over without
removing, with pebbles. 12s. 6d., 10s. 6d. ; with best glasses,
4s. 6d., 65., 7s. 6cr. ; solid sold, 208. per pair.
Address, BERNARD DAVIS, 430, Euston-road, London,
Optician to the Opthalmic Institutions.
TELESCOPES—By the application of the improved lenses,
Mr. D. can guarantee his telescopes as being of the highest
power and at half the usual charges, viz. : —Small pocket
telescopes, to define 5 miles, 10s. tid. ; ditto, 10 miles, 21s. ;
ditto, and showing all the heavenly bodies, 42s.—size, from
4 inches to 6 inches long.
MICROSCOPES with the improved lenses.—Student com-
pound achromatic microscopes, with three powers and every
necessary, 635. and 84s. in mahogany cabinets ; compound mi-
croscopes, with one strong power, magnifying 5,000 times
10s. 6d. ; ditto, three powers, 125. 6d. ; ditto, with every ne-
cessary, magnifying 20,000 to 40,000, 215., 305., 425. Printed
instructions how to use microscopes free with each instru-
ment.
Opera and Field Glasses of the highest power, at 155., 215.,
305., Vs.
MAGIC LANTHORNS AND DISSOLVING VIEWS.

Descriptive Catalogues for 2 stamps.—Post-office Orders
payable, Euston-square, Bernard Davis, optician, 430, Eus-
ton-road, near Itegeat's-park, London.

DR. CURTIS' MEDICAL womc, MANHOOD:
k MEDICAL ESSAY ON SPERMATORRERE
NERVOUS AND GENERATIVE DEBILITY, &c.
lust Published, the 150th thousand, with numerous plates,
in a sealed envelope, price ls., Sold by all Booksellers, and
sent post paid, by the Author, for 12 stamps,
‘,l ANHOOD : the CAUSE and CURE of PRE-
T' MATURE DECLINE
HealthN with Plain Directions
or Perfect Restoration to and Vigour. By Dr. J. L.
Cunms, 15, Albermarle-street, Piccadilly, London.
CONTENTS:
INTRODUCTORY CI I A PTE it on the Physiological
structure and Functions of tile Reproductive Organs.
cl lArT E 11.—Causes of Spermatorrh tea and Impotence;
,'arly Vicious Indulgences; Dangers of Neglect.
CHAPTER Ill—A Review of the various Disqualifications
f Marriage; whether resulting from Youthful Abuse, the
Follies of Maturity, the Effects of Climate, or Infection.
CHAPTERS IV. and V. on the modern Treatment of
Gonorrhoea and Syphilis.
The Book concludes with numerous varied and interesting
aces, to which is added the Author's recipe of a preventive
Lotion.

REVIEWS 014' THE WORK.
"Curtis on Manhood.—This is a truly valuable work, and
should be in the hands of young and old."—" Sunday Times,"

.3d March, 1856.
"The author has conferred a great boon by publishing this
little work, in which is described the source of those diseases
Which produce decline in youth or more frequently premature
old age."—" Daily Telegraph," March 27, 1856.

" This work, which for twenty years has stood the test of
professional criticism and empirical hostility, treats in a plain
and sympathising manner on the various disqualifications
ind impediments arising from iiervous excitement and de-
bility ; and to invalids suffering from youthful errors and
xcesses it will be found valuable and useful."—Record.

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Condon : Published by J. Allen, 20, Warwick Lane, Pater-
noster-row: Mann, 39, Cornhil/.
gourd or Ccnioultatiou-10 to 3 and 0 to 8; fiunds o 10 till 2