The tonometer: explaining and demonstrating, by an easie method, in numbers and proportion, all the 32 distinct and different notes, adjuncts or suppliments contained in each of four octaves inclusive, of the gamut, or common scale of musick.

With their exact difference and distance. Whereby the practitioner on any key'd, or fretted instrument, may easily know how to tune the same. And also, with great exactness, how to transpose any musick from one key to another, sharp or flat, higher or lower; with proper sharps or flats thereto. Never before published.