Lähetä tietue sähköpostilla: Dissertatio physica, animadversiones in theoriam et experimenta cel. Du Tour de diffractione luminis continens. Cujus partem quartam, cons. ampliss. facult. philos. Aboens. publico examini subjiciunt Petrus Ekenvall, phil. mag. et Adolphus Bruun, Ostrogothus. In aud. majori die XVII Decemb. MDCCCIII. horis a. m. consvetis
