The book was born from the deepening of the study of the equilibrium of the components of civil constructions, for which at the Polytechnic University of Naples in the 60s were given an overview of the Riemann mechanics.
After twenty-seven years as an engineer, I realized that the study of static problems made me cross into the dress of the mechanics of the elements (Riemann's Tensorial mechanics) and I published the unified field thesis in 1990.
In that thesis I maintained that we could reduce all the physical quantities to tensiors that could be treated with the Riemann mechanics and understand in them all the phenomena that can be detected experimentally.
The mass disappeared and the electric quantities were transformed into tensors of the second and third order, reducible to invariants of which it was possible to derive a mathematical relation.