The Whig standard. [volume] (Washington, D.C.) 1843-1844, 1843-12-27

., SoUTH LEicEsrERs Mass, Disc. 10th 16A0e44
If To n. PATTEk:--Sir. Al G6rreslondea4 Has lor-
warded us copy Of the Wig STANDARD ~ hasain
we find some remarks relative % the MERITS cf anec-
tacle lenses and your signature RNtt4ehed to thu
article, we take the liberty to reply to II = AZ
ton from your otcn optical knowledge. YQn have
dissertation on visual optics, in which yod have
chosen to make mention Of the Perifoc 81 Parabola
lenses in such manner, that, admitting your state
ments 10 be correct, must be impostets. We now
assert that bosrc.ced - optics hasled
you into tissue of false assertions and htenablc ~
sumpiions. Your renafks on theysprfacea AZ Menis-
Gus lenses would argue that sphere can be- mQre
spherical The mention Of (" greater degree Of
sphericity when the subect-natter under discussion
is sphere is too absurd for moments Investigation.
of light to perfect " is faso and must b pre
dicated through your larnentable ignorance of the
subject youhav attacked. Permit me toinform yas,
sir, thai, when section of m ellipsod at sev0lq-
satisfy given proportion is obtained parallel rays
,ciH 6e co.,peyxsd to psusct focus And al tB yosr
statement that Meniscus lenses c0nvefge rays - te
same as double convex lcnsess" allow s to remark
that in case is the action OF the lenses ae same
The proprietor Of any school book OPTICS wliex-
plain this to your satifacon. You quote Pr. Brew
,ster ON the Meniscus lsnse.p The Pr. Mas m Epro
pean optician, and consequently infaiihle, Never
theless, we contend that Menscus lenseS whose Suf
bear proper prSpoTsoa; e sSs Se gre 81:
the eye placed in the one fcci Of The spSctaeles ana
the object viewed in eother any lense Of imperfect
curvature would give distorted figure. And dbstls
corper lenses 0issays but never in tho 90
Of spectaces used in such Positions the rAysreeaivnd
through the tense are parallel a. those that enter the
obicct-glass of telescopes and the eye, always be-
ing far within the foc Of the tense, is not senabe Of
alteration Chromatic Or otherwise. In this vjaM Of
the case the learned Doctors remarks have 10 force.
You Is it not pfepoststous TO apply piece q
bent gassi' &c. IN this question You a$suna6 that
our glass is bentyou dared not assert t1at sy ssrs
bent though you no doubt intended to have yourrc-
marks convey such an idea Our giasses are not est
into their form they are ground into the fotnasA
which they are sold gin reply to yepr comment
on their evil tendency in long use, would refer YEN
to Professor Silman, DR.. Mcclellan, and hq0t "a
scientific men, whose names have been @ff9l1
rendered us and can be seen ut our agents dico Il
YOU had been at all conversant in optics, you would
never have made the assertions at the CLOSE oIJour
article that ~the general c0nvietioA y that qqQb
CONVEX and concaye lenses are the basil for The eyA
Thoae forms have been worn from Neces1$ly; and
even European opticians have exhausted eher m<9-
nuitv to produce the form you havs takeh dPoA you
/ to- repudiate Years Of toll has been oonsae1ea 81
ms to produce the parabola curve We are - II
| cans who acknowledge no superior y OsH ~ ~ -
| old world nor have we CLEANED our swsN9 Een
;ts masters With eur own hands have ~ len!l~a
according to our own minds, and the r9sqlAsh hoee
the publio We have produced An article tAoei Ne
genius Of Europe attempted IN VAIN QNf lueA q
All kinds bid defiance, in density Of hotaftels nd
brilancy of finish, to all coWpetton and Wncn q
optic;ass attacks their reputation, We WIZ p rsAdy to
gSvs thh raf3daos Of their action, 1l ll;1s'syY
y AZ SflSoSt, ogay yFlEQ(Gtyt u. io3TMo
.dinon Yr3yo III yGbisoM Tend ,paitasm 10