minor key, and, if you be not perfectly fare 
of the trutli of your ear, touch the notes on 
the harpfichord as often as you are in doubt. 
Having thus made fure of the notes in 
their natural order, in both modes, you may 
now proceed to ring changes on them thus. 
i>3>5>7i7'5'3' 1 - then 1,4, 6,8; 8,6,4,1: 
continuing to alternate thefe chords till you 
have them quite perfect. You may now 
take them in the following order : 1,25 1,3; 
1,45 1,5; 1,6; 1,7; 1,8; then, 8, 7; 8, 6; 
8,5; 8, 4; 8, 3; 8, 2; 8, i. When you are 
quite perfect in this third lefTon, both ma- 
jor and minor, your fourth leflbn may be 
in this progreflion i, 3; 2, 4; 3, 5; 4, 6; 
5,7; 6, 8: then 8, 6; 7, 5; 6, 4; 5, 3; 4,2; 
3, i. Prefuming that you can fmg thefe 
four lefTons with great eafe and certainty, 
you may proceed to the chromatic fcale, 
riling by half-notes from the lower to the 
upper octave, and defcending in the fame 
manner; and now the great bufmefs is over. 
Take a fong, or any book of Mufic ; pitch 
your key, and you will find, that, with a 
little practice, you will be able to hit the 
notes as certainly as with an inftrument. 
It was a very juft obfervation of my wor- 
thy acquaintance Dr. J who is himfelf 
a good 
