We have seen how Husserl's development, from the beginning of his philosophical reflections to his composition of Ideas I, leads naturally into problems of genetic constitution. In order to close our study of his concept of constitution, let us briefly examine how genetic phenomenology is presented in Formal and Transcendental Logic ¹ and, subsequently, in the Cartesian Meditations. ² It is present in definitive form in these two works, and study of them will show how Husserl's early doctrine of constitution finds the final term of its evolution.