Table of contents : Copyright Forword Terminology Bibliography Part A. Harmonic Involutions 1. In General. A' Harmonic Involutions in Collinear Series of Points 2. in General B' Symmetrical Pencils and Collinear Harmonic Involutions 3. Analyzing Symmetrical Central Pencils and Collinear Harmonic Involutions C'. Method of Symmetrical Pencils 4. Method of the Egress from a Line to Its Plane. 5. Method of Symmetrical Central Pencils. 6. Applications of Properties and Methods. D' Orthooptical Pencils and Orthooptical Points 7. in General E' Harmonic Involutions of Cocyclic Series of Points 8. In General 9. Applications Part B. Harmonic Multilaterals and Harmonic Lines 10. In General A' Harmonic Collinear Multilaterals 11. In General B' Regular Central Pencils and Collinear Harmonic Groups of n-Points 12. Review of the Closed Regular Central Pencils and Collinear HarmonicGroups of n Series of Points. C' Method of Regular Central Pencils. 13. In General. D' Orthooptical Regular Pencils and Orthooptical Points of Closed Harmonic Groups of n. 14. In General. 15. Applications of the Method of Regular Pencils E' Harmonic Cocyclic Multilaterals 16. In General. F. Harmonic Closed Central Pencils and their Intersection from a Line and a Circle 17. Analysis of the Closed Harmonic Central Pencils and their Intersectionsrom a Line and a Circle. G'. Method of the Harmonic Central Pencils. 18. In General. 19. Applications of the Method of Harmonic Pencils and not only that. 20. The Problem of the Vicennium 21. The Amazing Method of the Harmonic Transformation 22. Applications of the Method of Harmonic Transformation 23. In General. 24. Pairs of Open Central Flat Harmonic and Regular Pencils of 2n Beams and their Orthooptical Points. 25. Applications Relevant to the Pairs of Collinear and Cocyclic Harmonic Lines and Pencils. Part C. Supplement of Part A 26. In General. 27. Introducing the Method of Harmonic Transformation in Harmonic lnvolutions Part D. Supplement of Part B. 28. Generally. 29. Applications of Harmonic Multilaterals, mainly using the Method of Harmonic Transformation. Part E. Auxiliary Propositions (Lemmas) 1. In General. 2. Geometrical Auxiliary Propositions (AP). Epilogue Figure Index Contents It Was Said Important remark from page 12: Author