[Advertisement] John Dabney, Mathematical Instrument Maker from London, In King-Street, Boston, New-England. Makes and Mends all Sorts of Mathematical Instruments, as Theodolites, Spirit Levels, Semicircles, Circumferenters, and Protractors, Horizontal and Equinoctial Sun-Dials, Azimuth and Amplitude Compasses, Eliptical and Triangular Compasses, and all sorts of common Compasses, drawing Pens and Portagratons, Pencil-Cases and parallel Rulers, Squares and Bevils, Free-Masons Jewels, with sundry other Articles too tedious to mention.

n.b. He sets Load-Stones in Silver or Brass, after the best Manner.