The Whig standard. [volume] (Washington, D.C.) 1843-1844, 1843-12-29

CPECTACLES My attention mas oeen called to
- an article in the public papers and circulated in
handbs about this CITY, called Perifocal Spectacles
said to be constructed in accordance with the phi
losophy Of nature, IN the form Of ConcavoC Convex
Ellipss What is meant by the philosophy of nature
may be hard TO tell but certainly they at variance
from the laws principles Of Optics as certainly no
Epss converge the rays OF light to perfect TO-
Gus. They are said not to be the French menscus
or Wollaston's periscopic Zone and the same con-
struction Of glasses.) The menscus lens is truly
ground surface, concave side; the other side,
possessing greater degree of sphercity, consequent
ly becomes magnifyng glass This species OF glass
will converge the rays of light the same as double
convex lens The application Of this form Of lenses
in the shape of Spectaces, gives the eye greater
field of vision. s4T
The celebrated DR.. Brewster, in speaking Of these
Spectaces says that they give decidedly more 'mper-
feet visions than common spectacles, because they in
crease both the alteration of figure and of coor but
they may be of use in crowded city in warning us
of the oblique approach of objects. Now, as spec
tacles intended to assist nature, and the Eye,
the most perfect masterpiece of Divine Mechanism,
lin it's natural sate,) every part has the very form
and Office which the laws of optics require for the most
perfect vision Of object Is it not preposerous to
apply piece of bent concave or convex glass with
out true form figure to its assistance! On the con-
trary is it not reasonable to conclude that their con-
tinued use would destroy the eye entirely? Specta-
ces are probably the most ancient of all optical in
strumens, and yet has undergone the least change Of
any. The subject has been well considered by Opti-
clans throughout all Europe for ages, and the general
conviction is that truly ground concave or convex
lens is the most suitable for assisting decayng OF UNI
natural visions of the human eye Il. PATTEN. &
The subscribers have for sale at their mandatory,
on Pennsylvania avenue, south side, between 10th
and 18th Streets general assortment Of the best OF
Spectacles, with truly ground glasses. Glasses Of
the best quality fitted to old frames, &C. Also, Sur
veyors Compasses, Levels, and Drawing Instruments,
of the best quality ~ 'sa
w instruments made to order, and warranted
4 dec 9-lm &c.
A CARD.-The subscriber respectfully informs his
IA friends and customers that their accounts will
all be rendered to them the 1st January next and
he earnestly hopes that all viii be prepared to settle
the same, either by cash, notes atvcy short dates
This is absolutely necessary in order to enable him
TO meet engagements that are upon him, and which
he can only do by realizing what is due to him.
Those especially, whose accounts have been long
due will confer great favor by being ready to settle
the same when called upon.
G.. III. JAMES,
dec 15-dtJI IKE. Corner 18th and f. Streets
OIL BLEACHING, &C.---If you want dry fee
" all winter, prepare your boots and shoes with
Leather Preseryative or Oil Backing, which will