Yes, you are correct kirk. The only think that makes it a bit harder is past the harmonic at the 5th fret they stop falling directly above the frets. They can all be easilly found. Just pluck the string rapidlly, but not too fast, and slowly
slide your finger down the string, you should hear each one as you pass it. they are everywhere, the higher order the harmonic the more times it appers, at half the length theres is one, the 12th fret. At 1/3 the length there are 2, the 7th and 19th frets, at 1/4 the length there are 3, the 5th, 12th and 24th frets. at 1/5 the length there are 4, just behinde the 4th fret, the 9th fret, the 16th fret, and one more in imaginary fret land. at 1/6 the string length there are 5 and so on.
Gravitas- im not exactlly sure what you are talking about but it sounds like you are describing artifical harmonics, probablly played with distortion, and most likely accomplished by freting a note then simitaniously plucking it and hitting a harmonic near the bridge. This can be done either with your fingers or if your using a pick with the side of your thumb, so you would pluck the note and in the same motion hit a harmonic with the side of your thumb, it an be a little hard to do. Keep in mind when you fret a note you change the length of the string and in doing so the location of all the harmonics, though they always occur at the same intervals(1/2, 1/3, 1/4) the length. Also there are no frets near the bridge so you have to learn where they are without a solid reference. Hope this helps, if you googled "artifical harmonics" you could find alot more.