She asked "Uncle" for his guitar and at once found the chords of the song.
A diameter is a line through the centre and terminated by the curve: it bisects all chords parallel to the tangents at its extremities; the diameter parallel to these chords is its conjugate diameter.
The chords necessary in this part, which with its supporting bass is called the continuo, were indicated by figures; and the evanescent and delicate tones of the harpsichord; lent themselves admirably to this purpose where solo voices and instruments were concerned.
The straight line and the line through the centre parallel to the chords are named conjugate diameters; each bisects the chords parallel to the other.
The highest chords he strikes are those of reason and self-love.