Accés restringit als usuaris de la URL (Blanquerna, Fac. Pere Tarrés). Sol·liciteu claus d’accés al personal bibliotecari

“…Observations solaires, stellaires et planétaires…”

Tabla de Contenidos: “…Conté: Reduction of the magnetic observations ; Indications of magnetometers on thirteen days of great magnetic disturbance ; Results of observations of the magnetic dip. ; Observations of deflexion of a magnet for absolute measure of horizontal force ; Results of meteorological observations ; Observations of luminous meteors…”