A note on the sunspot and prominence records made by Angelo Secchi during the period 1871–1875

Angelo Secchi (1818–1878) was an Italian Jesuit who made relevant scientific contributions in geophysics, meteorology, and astrophysics. He a well-known pioneer solar physics due to his theories observations. published Le Soleil (The Sun) summary of knowledge about our star that time. Moreover, he this book sunspot prominence observations during the period 1871–1875. In work, we present machine-readable version these preliminary analysis them.