  In this work the investigation of hadronic structures with the help of the
harmonic quarks is prolonged. The harmonic quark model is good at describing
the meson structures and the baryon excitations to resonances, in particular
delta(1232). Harmonic quark reactions form the structure of the baryon
resonances. Presumed quark structures of the mesons eta(548), omega(772),
a(980) and f(980) are given. It became clear that the some hadronic structures
contain the filled quark shells. The kinetic quark energy in the basic charged
mesons are enough small for a using of perturbative methods. The following
topics are briefly considered and discussed: harmonic quark series and its
boundaries, the d-quark peculiarity, parallel quark series and quark mixing.
The boundaries of quark chain can are closely related to a weak interaction.
The cause of the quark mixing is probably an existence of the parallel quark
chain and the special properties of the d-quark in the main quark chain. The
new mass equation is found. It is probably a manifestation of Higgs mechanism.
Using this equality enables to improve the accuracy of the harmonic quark
masses calculation to 0.005%. The strong interaction should take into account
the harmonic quark annihilation.
