<p style="margin: 0.0px 0.0px 0.0px 0.0px; font: 9.0px Times;">The archive, which testifies the activity of the offices dedicated to geological studies and to the collection of meteorological investigations from 1870 to 1895, contains important files of scientific correspondence. The latter includes letters from scientists, members of the councils, committees and research commissions established under the Ministry of Agriculture Industry and Commerce, as well as correspondence of technicians who were charged with particular duties by the administration, like Nicola Maraglia, general director for Agriculture, and Felice Giordano, director of the Service of the Mines. They are rich in news, opinions, observations and reports portraying scientific events and personalities of the time. As an example, some documents concerning the following topics are illustrated: the origins of the Central Office of Meteorology and the role of Giovanni Cantoni the establishment of a service for the systematic collection of data about seismic phenomena, by Michele Stefano De Rossi; the activity of the Geodynamic Commission; the project by Giulio Grablowitz for the constructionof the observatory of Ischia.</p> <br /> <br />