A preliminary discourse to a scheme, demonstrating and shewing the perfection and harmony of sounds. By William Jackson, M.M.
Jackson, William,M.M.
Westminster : printed by J. Cluer and A. Campbell,
1726.
The plate is a volvelle, or "circular scheme" entitled 'The musical index'.
With a final leaf advertising the manufacture of the "circular scheme" in brass by J. Benj. Scot.
ESTC