 The work was later become the basis of Cesare Lombroso's monograph "L'uomo di genio in rapporto alla psichiatria" (Man of Genius)

In 1890 Jacobi returned to Russia, where he worked as a psychiatrist in Moscow, Orel and other locations, as well as conducting ethnographic research.He was one of the people that made possible transformation of psychiatric institutions from the places for isolation of mad people into the medical clinics primary concerned with the treatment of their patients.Jacobi organized the psychiatric clinic in Kishkinka, Orel (now Orel Regional Psychiatric Hospital) and the psychiatric clinic in Pokrovskoye-Mescherskoye near Moscow (now Moscow Regional Psychiatric Hospital N2) that were exemplary for their times.