There's a new version of the chart !... about harmonicity and symphonicity... I explain in my personnal and non-official nor perfect definitions :
Harmonicity : is the quality of two or more pitches heard at the same time in terms of beating (sonance : located between pure consonance (unisson) and pure disonance (white noise)). These pitches show in that chart are those with the less beatings and since the interval is calculated from the tonic (1/1) the interval of pure fourth (4/3) stands like a dissonance... but in practice it can be used as a consonnance in chords that aren't in root position (first inversion).
Symphonicity : by that term we refer to what the Greeks from Antiquity where using to say 'the sounds that goes well one beside the other'. So it's the sound that you can put one after the other (horizontaly) as in a melody writing.
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Note that the more the symphonicity is complexe, the less complexe is usually the harmonicity... and the reverse is also true. In occidental music with a very rich harmony we can a very 'childish' use of the symphonicity comparing to the Indian or Arab music... or even Antique music that was only for one voice.
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Of course... if you write a melody with the symphonicity stuff... don't forget that with a new note... a new tonic (1/1) is defined... thus if you melody is D, F, A... so D is the first tonic... then F becomes the new (1/1), and so on. I'll explain more later for now I'll be late to work !! eheh
Cheers and have fun !