By means of the Dirac's method and the Hamiltonian's formalism the Nambu-Goto Classical theory is analyzed, dynamics equations ofthe Boson string are obtained and solved. Following this methodthe algebra of the flTSt class bonds is computed, that are the generators of the action symmetry of the Bosons strings. The analysis is made as for open strings as for close strings.

The movement equations in the General Theory of relativity corresponding to a particle in a weak gravitational field, le us appoint analogy with the movement equations of a charged particle in a electromagnetic field. A study of this solutions let us appoints a deep analogy between gravitation and electromagnetism. As consequence of this result you can express the weak gravitational fields by a system of equations similar to the Maxwell's for the electromagnetism field.