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SPECTACLES, &c.-The subscribers, Manufac-
~ turers Of Mathematical, Optical, and Philosophi
cal Instruments Cat 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 neary) all
persons 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
variety of Mathematical Drawing instruments from
~ to $60, 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 an Essay on the Human
Eye, showing its defects, and explaining the appca-
ton Of Optical Glasses, to its assistance &c.


PATTEN & SON,


South side Pennsylvania avenue,


noy Sim between 10th and | lth sts