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SPECTACLES, S1c.-The subscribers, Manufac-
~ turers Of Mathematical, Optical, and Philosophi
cal Instruments at the solicitation of their friends
have added to their establishment the article of Spec
tacles, in every variety Of forms, where glasses Of
the best quality, and correctly ground on optical
principles may be had to suit the sight Of (nearly) all
personsi gold frames made to order, of any pattern
glasses fitted to old frames and all work in the line
done in the best manner; where may be had great
$a to $50, Engineers and Surveyors Instruments of
superior quality, Pocket and other Telescopes, supe
rior Thermometers, in mahogany cases. for halls or
parlors, Barometers &c, Shortly will be published
in pamphlet form, with plates, Essay onthe Human
Eye, showing its defects, and explaining the applica
ton OF Optical Glasses, to its assistance, sc.


sU .tLA3 PATTEN & son,


South side Pennsylvania avenue,


nov Sim between 10th and llth sts