There are no advanced astrologers on here, except me and unfortunately I'm not into harmonics but may have some links for your research --
Harmonics
http://www.astrologyweekly.com/forum...ight=harmonics
http://www.bobmarksastrologer.com/harmonics32.1.html
Harmonic charts involve multiplying the positions of planets by a number so that they move to new points, and each number corresponds to a house, basically.
As I understand it the second Harmonic chart would shift things around such that oppositions become conjunctions,
in the 3rd harmonic trines would become conjunctions, in the 4th, squares become conjunctions.
The 1st harmonic is just your basic natal chart, so conjunctions are conjunctions.
The actual nuts-and-bolts of how it works are a bit hazy for me, and I haven't really looked at harmonic charts much at all so I couldn't say anything as to their usefulness or accuracy or anything, let alone interpretation.
Clearer explanations found here:
http://www.newage-directory.com/harmonic.htm
Some VERY IMPORTANT words of caution:
1) DON'T EVER try to do aspects between harmonics of different numbers. They are totally different animals.
2) There are no signs or houses in harmonic charts. Remember that everything has been rearranged, so please don't do sign or house interpretations because they are no longer there. The purpose of harmonics is to get more information about aspects and aspect patterns.
Now, let's take a look at some actual harmonics and how they can add depth to horoscope interpretation.
The Fourth Harmonic: The 4th harmonic shows how we deal with stress, strain, and struggle. When you construct a 4th harmonic chart, all of the conjunction, square, and opposition aspects in the original horoscope appear as conjunctions and this makes them easier to see. Of course, these aspects are pretty easy to see in the original horoscope as well, so what's the point? The point is that the minor aspects, the semi-square (45 degrees) and sequa-square (135 degrees), which are difficult to spot by a quick visual inspection, now appear as oppositions, and can be seen at a glance. Not only that, but other minor stress aspects (22 ½ degrees, 67 ½ degrees, 157 ½ degrees), which can take a very long time to locate, now become squares. In the 4th harmonic, whole patterns of stress aspects can be spotted, and this gives you a big edge for interpretation.