This exercise is from the Core Skills section on Harmonics.
You may remember from the introduction video that we explain the difference between natural and artificial harmonics there. We also show what is involved in playing artificial harmonics. They are very difficult at first, and you should definitely watch the video to make sure you know what to do.
Remember the only difference between natural and artificial harmonics is that natural harmonics 'naturally' occur along an open string. These are the easiest type to find and play. Artificial harmonics are where we fret notes and then find the relative harmonics for that note along a string.
Here we fret the F# note on the 2nd fret of the high E string and pick it. Keep that finger in place. Next we find the octave harmonic - which will be over the 14th fretwire. It will NOT be at the 12th fretwire, like the previous exercises, because by fretting the F# we have shortened the length of the string. In turn this affects all the locations of all the harmonics along that string. Because we have shortened the string by about 2 frets, the harmonics will have shifted roughly by about 2 frets too.
Don't forget that to play that harmonic up on the 14th fret you need to pick AND mute the string at the sweet spot over the 14th fretwire. Your other hand is tied up holding the note on the fretwire - definitely make sure to watch the introduction video to see how this is done!
After finding the artificial harmonic for F#, we then do the same thing for F - 1 fret lower. Notice that the artificial harmonic is now at the 13th fretwire. This technique will take a lot of practice, and don't worry if you can't do it for quite a while. Just work on it now and again and over time you'll start getting the hang of it.