33S SKETCH OF THE HISTORY OF THE 



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The piece I have here fele£led is an air, with one 

 of its variations. In the treble of the former we 

 obferve a conflant recurrence of two notes (be thofe 

 what they may) precifely in the fame order through- 

 out. The variation is produced merely by the fmgle 

 note 7 being inferted alternately, in the place of a 

 reft. The oblique mark \ above the letters implies 

 that the notes muft come in fucceffion, the upper 

 one firft, as this mark / fignifies a contrary fuccef- 

 fion. , 



Ifhall 



