Page:Letters to a Young Lady (Czerny).djvu/71

 The tenth is the same as the third.

You will observe, Miss, that many different intervals, when struck, are taken on the very same keys. For example, the superfluous second and the minor third; or the superfluous fourth and the false fifth, &c.

But, in thorough-bass, these intervals are distinguished from one another in two ways:

1st. Because each of them requires, for its