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SPECTACI.ES, SSc.-The subscribers, Manufac-
- turers Of Mathematical, Optical, and Philosophi
cal Instruments Cat the solicitation of their frends
have added their establishment the article Of Spec
taccs in every variety of forms, where glasses Of
the best quality, and correctly ground optical
principles may be had to suit tile sight Of (nearly) 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 $50, Engineers and Surveyors Instruments of
superior quality, Pocket and other Telescopes, supe-
ror Thermometers in mahogany cases, for halls or
parlors Barometers, &c. Shortly will be published
in pamphlet form, with plates, Essay on the Human
Eye, showing its defects, and explaining the applica
ton of Optical Glasses, to its assistance, &c.


PATTEN & SON,


South side Pennsylvania avenue,


nov 6-lm between 10th and L lth sts